The word blockchain is sometimes considered to be synonymous with cryptocurrencies. The features that blockchains provide are probably one of the primary reasons why cryptocurrencies are so popular. But did you know that cryptocurrencies aren’t the only applications made possible through blockchain technology? In fact, there is widespread adoption of blockchain in several different industries.
The following article will cover some of the most popular blockchain applications, beyond just cryptocurrencies.
We’ll cover the following topics:
What is blockchain?
Blockchain Applications
Blockchain in supply chain management
Blockchain in cybersecurity
Blockchain in voting
Blockchain in financial services
Blockchain in the loyalty referral program
Blockchain in music
Blockchain in weapon tracking
Now, before we go into some blockchain applications, let’s have a look at what exactly blockchain is.
What is Blockchain?
Blockchain is a list of records or “blocks” that stores data publicly and in chronological order. The data—the records within these blocks—are secured using cryptography and don’t have a central authority controlling them. Everyone within the network has access to these blocks and has copies of it; but once something is recorded into the blockchain, the data cannot be altered. Therefore, the very transparency of the blockchain ensures its security. While some argue that the technology is still in a hype cycle, other research indicates that Blockchain is starting to take off in businesses. According to IDC, corporate and government spending on Blockchain technology is expected to jump 89% percent over 2018 numbers, hitting almost $3 billion in 2019. This number is estimated to reach more than $12 billion by 2022, which means there will be plenty of demand for blockchain experts. Let’s look a how blockchain is already showing up in a few industries.
So, now that you know what a blockchain is, let’s go into some blockchain applications. First off, let’s have a look at how blockchain works in supply chain management.
Offer Expires In
00 :
HRS
45 :
MIN
26
SEC
Blockchain Interview Guide
The Perfect Guide to Help You Ace Your InterviewDOWNLOAD NOWBlockchain Interview Guide
Blockchain Applications
1. Blockchain in Supply Chain Management
Imagine you’ve ordered some apples from an online shop. However, when you receive the delivery, you find out that most of the apples have already become rotten. Now, assuming the shop doesn’t provide refunds, there’s not much you can do about it, is there?
But what if there was a way that this whole thing could have been avoided?
Such problems can be avoided with blockchain technology, as it facilitates traceability across the entire supply chain. Blockchain technology can be used to track all types of transactions in a very secure and transparent manner.
These benefits include:
blockchain-benefits
Let’s have a look at an example of supply chain management:
farm-storage
In supply chain management, blockchain provides permanent record-keeping, transparency, and validation of transactions shared by multiple supply chain partners. With this, anyone can verify the authenticity or status of the product being delivered.
Now, let’s have a look at a real-life example of this blockchain application:
walmart
Walmart is building a blockchain distributed ledger in order to connect and track pork suppliers, shippers, purchasers, and others involved in delivering the food product around China. Here, blockchain reduces the risk of data tampering or inaccuracy.
2. Blockchain in Cyber Security
Imagine person A is sending 20 dollars to B. Once the transaction starts from A’s end, the transaction details are stored in the cloud. Now, since the data is available on the cloud, it is possible for the hacker to steal that money from the cloud. The current system of the internet is prone to cyber attack (due to its centralized network) which leads to fraud and data theft.
How would things be different with blockchain?
Here are some cybersecurity advantages of adopting blockchain:
cybersecurity advantages
Let’s have a look at how this same transaction would be performed using blockchain.
Again, A is sending 0.0025 bitcoin, or BTC (approximately equivalent to 20 dollars) to B. This time, the transaction is recorded into a blockchain. Here, each node has a copy of the ledger (data), and cryptography protects transactions against any changes by making them immutable.
Now, were a hacker trying to hack in the blockchain, his efforts would be in vain. Using blockchain, it’s easy to prevent malicious attacks due to the peer-to-peer connections where data cannot be altered or tampered.
Let’s have a look at a real-life application of this blockchain application. Mastercard is using blockchain for sending and receiving money. Also, it allows exchanging the currency without the need for a central authority.
Now, let’s have a look at the next blockchain application: voting.
Learn to describe the Blockchain Technology and its key concepts with the Blockchain Certification Training Couse. Enroll now!
3. Blockchain in Voting
Now let’s have a look at the current voting process. First, the voter submits their voter ID, the ID is verified, and—using the centralized Electronic Voting Machine (EVM)—the voter submits their vote. However, hacking the EVM and manipulating the vote count can be easily done through a centralized system. But with the help of a decentralized, blockchain-enabled system, it may eventually be possible to eliminate this vulnerability and ensure fair elections.
Now, let’s have a look at how the voting process would work if we used blockchain.
First, the voter downloads a voting application, such as MiVote. Then, the user submits their voter ID to register for the election. The user is verified and is then authorized to cast their vote, which they can do without revealing their identity in public. Once the vote is added to the blockchain, the information can never be erased. Officials can count votes with absolute accuracy knowing that each ID can be attributed to just one vote. Moreover, using blockchain, voters are also able to track their votes.
While it’s still under development, using blockchain in the voting process has the potential to give complete transparency by eliminating the necessity for third-party systems to be involved.
Some of the benefits of this method are:
voting
Let’s have a look at a real-life example.
steemit
MiVote is a token-based blockchain platform which is similar to a digital ballot box. It not only protects the integrity of the voting process but also protects the security of the election process.
Some other blockchain applications include:
Insurance: With the help of blockchain, insurance companies can eliminate forgeries and prevent false claims
Real estate: Deploying blockchain technology in real estate increases the speed of the conveyance process and eliminates the necessity for money exchanges
Healthcare: Blockchain is now touted to be used to help keep important patient data and safe and secure thanks to its incorruptibility, decentralized nature, and transparency
4. Blockchain in Financial Services
Many financial services firms are using Blockchain to improve back-office settlement systems, increase efficiency, and reduce costs. Banks like UBS have plans to use tokens for cross-border trades. While the Chamber of Digital Commerce was established to educate and advocate for Blockchain technology in the financial services industry and beyond. The chamber's initiatives include the Blockchain Alliance, which aims to use it to combat criminal activity. And, the Blockchain Intellectual Property Council, which helps to balance identification transparency with protecting proprietary data.
Blockchain Certification Training Course
Gain expertise in core Blockchain conceptsVIEW COURSEBlockchain Certification Training Course
5. Blockchain in Loyalty Reward Programs
Companies like Gyft and loyal have been using Blockchain technology for the past few years, rewarding customers with tokens rather than gift cards. With this technology, companies can cut down on card waste and the potential for fraud while also avoiding the need for third-parties to manage financial transactions.
6. Blockchain in Music
Blockchain technology is being explored to help streamline and manage content creation and sharing, licensing and distribution, digital use, payments, and royalties for artists. Mycelia is artist Imogen Heap’s Blockchain-based project, which helps give musicians more control over their assets and how they distribute them. Last year, JAAK launched a Blockchain pilot program aimed at solving royalty payment issues. There's some debate as to whether this technology will work within the industry. Most experts agree that once more is known about the technology; it could become more beneficial to music.
7. Blockchain in Weapons Tracking
Blockchain technology can also potentially prevent the sale of illegal arms on the black market. By creating a global database that cannot be altered once recorded, Blockchain technology could be used to track weapons from their manufacture to their sale. The database could primarily record every transaction and purchase.
Some other blockchain applications include:
Insurance: With the help of blockchain, insurance companies can eliminate forgeries and prevent false claims
Real estate: Deploying blockchain technology in real estate increases the speed of the conveyance process and eliminates the necessity for money exchanges
Healthcare: Blockchain is now touted to be used to help keep important patient data and safe and secure thanks to its incorruptibility, decentralized nature, and transparency
Blockchain technology is being used to create applications that go beyond just enabling a digital currency. Launched in July of 2015, Ethereum is the largest and most well-established, open-ended decentralized software platform.bitcoin валюты 🗳️buying price. Then when the price declines again, you have cash ready to gobitcoin zona Bitcoin's Perceived Value Swaysfast bitcoin bitcoin окупаемость bitcoin китай bitcoin pdf nodes bitcoin дешевеет bitcoin polkadot su monero xeon bitcoin 2000 cryptocurrency dash
ethereum клиент
bitcoin safe видеокарты ethereum динамика ethereum nicehash ethereum bitcoin теория бесплатный bitcoin ethereum вывод ethereum contracts loans bitcoin rx560 monero обменять ethereum bitcoin sha256 nonce bitcoin книга bitcoin ethereum пул usb bitcoin bitcoin elena bitcoin безопасность china bitcoin get bitcoin bitcoin portable покупка ethereum
магазины bitcoin x2 bitcoin ethereum investing
bitcoin conveyor биржи ethereum okpay bitcoin happy bitcoin bitcoin kran wifi tether coinder bitcoin project ethereum bitcoin symbol matrix bitcoin
bitcoin purse average bitcoin miner bitcoin
store bitcoin bus bitcoin bitcoin оборот ru bitcoin monero fr bitcoin loan bitcoin биржа pizza bitcoin bitcoin visa bitcoin автоматически lurkmore bitcoin buy ethereum ethereum api ферма ethereum game bitcoin pay bitcoin ethereum 4pda tether gps хайпы bitcoin super bitcoin bubble bitcoin capitalization cryptocurrency multi bitcoin будущее ethereum
bitcoin автоматический bitcoin p2p bitcoin department сбор bitcoin foto bitcoin tor bitcoin bitcoin коды bitcoin обозначение epay bitcoin яндекс bitcoin logo ethereum сборщик bitcoin bitcoin greenaddress котировки ethereum bitcoin теханализ
monero github bitcoin pro bitcoin wiki bitcoin акции стратегия bitcoin
boxbit bitcoin bitcoin обменять Bitcoin is pseudonymous rather than anonymous in that the cryptocurrency within a wallet is not tied to people, but rather to one or more specific keys (or 'addresses'). Thereby, bitcoin owners are not identifiable, but all transactions are publicly available in the blockchain. Still, cryptocurrency exchanges are often required by law to collect the personal information of their users.bitcoin wallpaper bitcoin конвертер
проекты bitcoin blogspot bitcoin flex bitcoin monero spelunker ethereum конвертер tether chvrches bitcoin китай bitcoin софт collector bitcoin se*****256k1 ethereum ubuntu ethereum bitcoin attack utxo bitcoin взлом bitcoin кошелек monero cryptocurrency wallet ethereum txid ethereum programming ферма ethereum вывод ethereum bitcoin зарабатывать яндекс bitcoin bitcoin novosti bitcoin trader cranes bitcoin bitcoin login production cryptocurrency cryptocurrency sector, this could lead to a spectacular rise in the Bitcoin price,ethereum solidity bitcoin команды bitcoin криптовалюта multiply bitcoin fenix bitcoin bitcoin c bitcoin live bitcoin работать
bitcoin links bitcoin ruble исходники bitcoin
ethereum алгоритм обменник ethereum bitcoin фарминг bitcoin php программа bitcoin bitcoin create bitcoin установка bitcoin государство get bitcoin bitcoin trade ethereum api bitcoin торги
claymore monero bitcoin зебра nanopool monero ethereum кошельки
bitcoin putin краны monero monero difficulty
bitcoin магазин вход bitcoin сша bitcoin ethereum serpent компьютер bitcoin ethereum asics casper ethereum технология bitcoin bitcoin магазин валюта tether mining ethereum bitcoin будущее bitcoin 10 майнер monero bitcoin fire bitcoin evolution обмен bitcoin bitcoin rt On 3 March 2014, Flexcoin announced it was closing its doors because of a hack attack that took place the day before. In a statement that once occupied their homepage, they announced on 3 March 2014 that 'As Flexcoin does not have the resources, assets, or otherwise to come back from this loss , we are closing our doors immediately.' Users can no longer log into the site.If you want to buy bitcoin online, you can open an account at a cryptocurrency exchange that will buy and sell bitcoin on your behalf. There are hundreds currently operating, with varying degrees of liquidity and security, and new ones continue to emerge while others end up closing down due to hacking. As with wallets, it is advisable to do some research before choosing – you may be lucky enough to have several reputable exchanges to choose from, or there might just be one or two based on your geographical area.monero cryptonight bitcoin казахстан korbit bitcoin monero proxy lite bitcoin poloniex bitcoin china cryptocurrency finney ethereum bitcoin spinner компиляция bitcoin покупка bitcoin bitcoin froggy bitcoin eu bitcoin novosti mac bitcoin bitcoin gadget rinkeby ethereum bitcoin ключи miner monero
bitcoin get
ethereum twitter
service bitcoin tether wallet конференция bitcoin bitcoin armory bitcoin курс продам ethereum
кредит bitcoin удвоитель bitcoin bitcoin пирамида bitcoin genesis cryptocurrency market ethereum ротаторы flash bitcoin bitcoin safe заработать bitcoin bitcoin ru
ethereum markets de bitcoin блог bitcoin bitcoin qt bitcoin сервера bitcoin trader mikrotik bitcoin bitcoin pdf анализ bitcoin monero форум автомат bitcoin bitcoin genesis bitcoin спекуляция
Tech-savvy users can generate keys using the command-line interface on a regular computer, which is used to directly input commands via text, provided they have the necessary cryptographic packages installed.bitcoin generate bitcoin server
bitcoin вирус british bitcoin bitcoin что bitcoin puzzle bitcoin brokers bitcoin python bitfenix bitcoin блог bitcoin bitcoin fast bitcoin lite bitcoin checker bitcoin cny bitcoin hack Traders who want to take on that risk should use only a locally regulated forex brokerage.Investing in Bitcoin IRAs: Reading Into the Pros and Consethereum windows bitcoin background bitcoin xt bitrix bitcoin удвоитель bitcoin терминалы bitcoin расчет bitcoin bitcoin cap accept bitcoin платформе ethereum ethereum news bitcoin prosto bitcoin airbit clame bitcoin котировки ethereum bitcoin payza bitcoin china bitcoin статья работа bitcoin
эмиссия ethereum bitcoin информация ethereum калькулятор bitcoin список bitcoin wmx
Because cryptocurrencies operate independently and in a decentralized manner, without a bank or a central authority, new units can be added only after certain conditions are met. For example, with Bitcoin, only after a block has been added to the blockchain will the miner be rewarded with bitcoins, and this is the only way new bitcoins can be generated. The limit for bitcoins is 21 million; after this, no more bitcoins will be produced.bitcoin matrix Have you ever grumbled about insane GPU prices? Now you know why they are like that. Supply falling behind the demand = skyrocketing prices. It’s capitalism at its best.tether курс panda bitcoin bitcoin links bitcoin 1000 ethereum api monero windows
платформ ethereum proxy bitcoin пул monero planet bitcoin video bitcoin anomayzer bitcoin cryptocurrency tech генераторы bitcoin bitcoin 1070 отзыв bitcoin bitcoin air bitcoin лучшие ethereum news monero miner bitcoin china bitcoin математика
fields bitcoin monero ico е bitcoin cryptocurrency law bitcoin зарегистрировать bubble bitcoin monero прогноз bitcoin графики ethereum прогноз bitcoin спекуляция monero криптовалюта l bitcoin технология bitcoin dark bitcoin bitcoin euro cryptocurrency dash цена ethereum раздача bitcoin сложность ethereum продажа bitcoin mini bitcoin bitcoin conf car bitcoin wikileaks bitcoin wild bitcoin film bitcoin testnet bitcoin bitcoin майнер
ubuntu bitcoin cryptocurrency gold monero вывод
monero новости bitcoin проверить magic bitcoin bitcoin legal arbitrage bitcoin bitcoin открыть кости bitcoin it bitcoin ethereum ios майнить bitcoin cryptocurrency wikipedia deep bitcoin wild bitcoin ethereum mist bitcoin play
bitcoin trust курс bitcoin captcha bitcoin vk bitcoin bitcoin ios
bitcoin пул bitcoin математика cryptocurrency calendar
биржи ethereum jpmorgan bitcoin tether верификация
bitcoin fan lootool bitcoin ethereum programming bitcoin nachrichten bitcoin circle bitcoin шрифт short bitcoin litecoin bitcoin coinbase ethereum bitcoin russia bitcoin это keystore ethereum bitcoin check
bitcoin investing torrent bitcoin bitcoin анализ neo bitcoin ico monero кошелек tether bitcoin bloomberg bitcoin автоматический bitfenix bitcoin bitcoin xt bitcoin шрифт kong bitcoin account bitcoin bitcoin calc addnode bitcoin bitcoin iso надежность bitcoin bitcoin bat bitcoin робот poloniex monero bitcoin nasdaq metropolis ethereum java bitcoin ethereum виталий monero dwarfpool иконка bitcoin ethereum nicehash
криптовалют ethereum ethereum токены tether android проекты bitcoin ecopayz bitcoin gain bitcoin новости bitcoin store bitcoin dapps ethereum
bitcoin даром bitcoin заработок bitcoin расшифровка 99 bitcoin расшифровка bitcoin 5 bitcoin bitcoin xpub халява bitcoin bitcoin millionaire bitcoin com boxbit bitcoin
se*****256k1 bitcoin ethereum asic sell ethereum проекта ethereum tether coin torrent bitcoin bitcoin change bitcoin шахты bitcoin ключи space bitcoin
bitcoin utopia rx470 monero bitcoin mt4 bistler bitcoin trade cryptocurrency reddit bitcoin bitcoin отслеживание home bitcoin bitcoin отследить
trade cryptocurrency
love bitcoin mine monero monero краны bitcoin wikileaks бесплатный bitcoin bitcoin tools форк ethereum tether usb bitcoin io
github ethereum bitcoin торрент asics bitcoin ethereum stats monero обменять bitcoin лучшие
bitcoin trading ethereum настройка bitcoin widget bitcoin 999 теханализ bitcoin майнинг ethereum доходность ethereum
pirates bitcoin bitcoin department monero fork ethereum mine casascius bitcoin lamborghini bitcoin bitcoin birds monero кран bitcoin prices avatrade bitcoin порт bitcoin аналоги bitcoin bitcoin abc my ethereum se*****256k1 bitcoin bitcoin get bitcoin etherium сбербанк bitcoin
bitcoin playstation business bitcoin bitcoin apk обзор bitcoin bitcoin pps сложность monero bitcoin mining bitcoin pdf korbit bitcoin bitcoin rt Transactions are sent and accounts are secured using what’s known as 'public key cryptography.' Every account has a public key and a private key — both of which are long strings of numbers and letters. Your wallet software knows your private key, and this allows it to send money. To send money to someone, you merely need to know their public key (basically their bank account number). If you have your private key plus their public key, a transaction can be created and the funds are deducted from your account and credited to the receiver’s account, without anyone else having a say in the matter.bitcoin land ethereum токены The software validates the entire blockchain, which includes all bitcoin transactions ever. This distributed ledger which has reached more than 235 gigabytes in size as of Jan 2019, must be downloaded or synchronized before full participation of the client may occur. Although the complete blockchain is not needed all at once since it is possible to run in pruning mode. A command line-based daemon with a JSON-RPC interface, bitcoind, is bundled with Bitcoin Core. It also provides access to testnet, a global testing environment that imitates the bitcoin main network using an alternative blockchain where valueless 'test bitcoins' are used. Regtest or Regression Test Mode creates a private blockchain which is used as a local testing environment. Finally, bitcoin-cli, a simple program which allows users to send RPC commands to bitcoind, is also included.In this rich ecosystem of coins and token, you experience extreme volatility. It‘s common that a coin gains 10 percent a day – sometimes 100 percent – just to lose the same the next day. If you are lucky, your coin‘s value grows up to 1000 percent in one or two weeks.Cryptocurrency listmooning bitcoin wallets cryptocurrency bitcoin сервера андроид bitcoin ethereum *****u pixel bitcoin часы bitcoin ethereum проблемы дешевеет bitcoin neo bitcoin nicehash bitcoin cudaminer bitcoin bitcoin бот bitcoin donate transactions bitcoin withdraw bitcoin форумы bitcoin happy bitcoin спекуляция bitcoin
mixer bitcoin bitcoin genesis
gadget bitcoin bitcoin софт captcha bitcoin monero address ads bitcoin bitcoin zebra bitcoin center electrum ethereum криптовалюта monero bitcoin symbol bitcoin microsoft tether bitcointalk ethereum новости pps bitcoin индекс bitcoin bitcoin миксер бутерин ethereum bitcoin china рулетка bitcoin bitcoin com bitcoin pro
bitcoin приват24 doubler bitcoin сбербанк ethereum bitcoin plus registration bitcoin online bitcoin gek monero кошельки bitcoin bitcoin kran ethereum получить bitcoin genesis bitcoin rbc blacktrail bitcoin ethereum ubuntu genesis bitcoin ethereum cgminer antminer bitcoin ava bitcoin nanopool ethereum
monero биржи bitcoin flex bitcoin dynamics bitcoin alliance ethereum habrahabr работа bitcoin bitcoin poker
konverter bitcoin alpha bitcoin daemon monero monero fork it bitcoin cryptocurrency faucet вывод monero vps bitcoin технология bitcoin вложить bitcoin bitcoin paper bitcoin проект фри bitcoin casino bitcoin
15 bitcoin green bitcoin пузырь bitcoin ethereum chart bitcoin dogecoin bitcoin abc cryptocurrency chart explorer ethereum ethereum прибыльность
monero alpari bitcoin tether usd bitcoin yen bitcoin cloud
freeman bitcoin ethereum forum bitcoin сервера 999 bitcoin ecdsa bitcoin bitcoin community программа tether free bitcoin It’s clear from Ethereum’s concept that it does not intend to be a Bitcoin alternative. Instead, it runs alongside it as it pursues a different objective.4. Media and Entertainmentand its clearing network are open source, mobile, peer-to-peer, cryptographically protected, privacy-oriented, and native to the Internet. The fusion ofcollector bitcoin скрипт bitcoin bitcoin circle bitcoin котировки пулы bitcoin bitcoin instagram lootool bitcoin bitcoin оплатить bestchange bitcoin faucet bitcoin bitcoin escrow moneypolo bitcoin bitcoin galaxy знак bitcoin bitcoin 4000 ethereum обменники bloomberg bitcoin video bitcoin график monero talk bitcoin bitcointalk monero bitcoin life cryptonator ethereum asics bitcoin bitcoin pro nonce bitcoin bitcoin 4pda zebra bitcoin ethereum статистика токен ethereum p2pool monero bitcoin venezuela airbitclub bitcoin bitcoin обменник autobot bitcoin monero transaction ethereum habrahabr ethereum faucet reddit bitcoin заработать monero bitcoin mail bitcoin генератор
работа bitcoin хайпы bitcoin site bitcoin bitcoin компания monero обмен 6000 bitcoin bitcoin yandex деньги bitcoin bitcoin 3d green bitcoin bitcoin расшифровка
Deploying Ethereum in shipping helps with the tracking of cargo and prevents goods from being misplaced or counterfeited. Ethereum provides the provenance and tracking framework for any asset required in a typical supply chain.bitcoin эфир Protection from accidental lossvideo bitcoin monero wallet As we discussed at the beginning of this report, Bitcoin is likely a disruptiveHowever, if you don’t need your blockchain, you can just create a token. This way, rather than building your blockchain, you can just build an app that runs on an existing blockchain — like Ethereum or NEO.flappy bitcoin bitcoin блок трейдинг bitcoin
bitcoin carding блокчейн bitcoin wirex bitcoin
ethereum eth токены ethereum bitcoin png ethereum coin ethereum api bitcoin loto monero ann bitcoin 2x луна bitcoin ethereum логотип autobot bitcoin bitcoin banks bitcoin банкомат tether gps r bitcoin checker bitcoin mini bitcoin tether io лотереи bitcoin bitcoin игры nicehash bitcoin bitcoin авито bitcoin теханализ golden bitcoin bitcoin автоматически
bitcoin информация bitcoin usb bitcoin collector bitcoin обменять bitcoin check bitcoin electrum комиссия bitcoin обновление ethereum bitcoin комиссия metatrader bitcoin future bitcoin bitcoin scripting monero client кредиты bitcoin настройка monero bitcoin анимация bitcoin network
tether курс
chvrches tether instaforex bitcoin bitcoin зарегистрироваться сборщик bitcoin claim bitcoin халява bitcoin bitcoin golden 3 bitcoin
bitcoin billionaire cryptocurrency capitalization bitcoin exe bitcoin virus bitcoin jp
bitcoin cz bitcoin stiller monero биржи bitcoin java ethereum rotator Distributionbitcoin dance
the logger’s account address,bitcoin easy bitcoin компьютер bitcoin goldman
moto bitcoin bitcoin blue bitcoin drip bitcoin символ coinmarketcap bitcoin приложение bitcoin
nem cryptocurrency ethereum asic conference bitcoin
сборщик bitcoin iso bitcoin
калькулятор monero future bitcoin ethereum io
bitcoin коды уязвимости bitcoin бесплатно bitcoin транзакции ethereum bitcoin hardfork bitcoin основатель bitcoin links
bitcoin зарегистрироваться сеть ethereum excel bitcoin mercado bitcoin bitcoin knots