[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"mining-farm-info":3,"glossary-related-en-block-header":7,"glossary-term-en-block-header":38},{"data":4},{"fpps":5,"btc_rate":6},4.3e-7,94967.34,{"items":8},[9,15,21,27,33],{"id":10,"slug":11,"term":12,"shortDefinition":13,"firstLetter":14},"ec8b1e45-bebe-4385-a817-b99aaae108c8","mempool","Mempool","Mempool, short for memory pool, is a temporary storage area where unconfirmed Bitcoin transactions are kept before they are included in a block. It acts as a waiting room for transactions, holding them until miners select and add them to the blockchain.","M",{"id":16,"slug":17,"term":18,"shortDefinition":19,"firstLetter":20},"e037bba7-f518-4be0-b772-66ac33c79dad","network-hashrate","Network Hashrate","Network hashrate is the total computational power being used by all miners on the Bitcoin network to solve the cryptographic puzzles required to add new blocks to the blockchain. It is measured in hashes per second (H\u002Fs) and determines how quickly the network can mine new blocks. ","N",{"id":22,"slug":23,"term":24,"shortDefinition":25,"firstLetter":26},"ffe0ce19-e39b-4554-9966-cbaa8c0a928e","asic-downtime","ASIC Downtime","ASIC downtime refers to the period when an ASIC miner is not actively mining cryptocurrency due to hardware issues, maintenance, overheating, power outages, network failures, or other operational problems. During downtime, the miner produces no hashrate and generates no mining rewards.\n","A",{"id":28,"slug":29,"term":30,"shortDefinition":31,"firstLetter":32},"6c0c3a92-a217-4ee6-b0bf-761839211e02","halving","Halving","Halving is an event in Bitcoin mining that occurs every 210,000 blocks, reducing the block reward by 50 %. It is designed to control Bitcoin’s supply, making the cryptocurrency more scarce over time. Bitcoin halving happens approximately every four years.","H",{"id":34,"slug":35,"term":36,"shortDefinition":37,"firstLetter":14},"caa2af9e-34f7-4c57-b565-3bdd3e847dc8","mining-reward-distribution","Mining Reward Distribution","Mining reward distribution is the process by which the block reward (including newly minted coins and transaction fees) is divided among miners based on their contribution to the mining pool. Learn how mining rewards are divided among miners, how pools distribute rewards.\n\n",{"term":39},{"id":40,"locale":41,"slug":42,"term":43,"h1":43,"shortDefinition":44,"simpleExplanationHtml":45,"howItWorksHtml":46,"exampleHtml":47,"contentHtml":48,"aliases":49,"abbreviations":50,"algorithms":51,"faq":52,"seoTitle":71,"seoDescription":72,"status":73,"publishedAt":74,"updatedAt":75},"c212d273-01c3-4c93-ab82-b575e1b74d1a","en","block-header","Block Header","A block header is a small section at the beginning of every blockchain block that contains essential information about the block. In Bitcoin, the block header is used during the mining process and includes data such as the previous block hash, Merkle Root, timestamp, difficulty target, and nonce. Miners repeatedly hash the block header during Proof of Work mining to find a valid block hash.\n","\u003Ch2>\u003Cstrong>Block Header Explained in Simple Terms\u003C\u002Fstrong>\u003C\u002Fh2>\u003Cp>A block header is like the identification card of a blockchain block.\u003C\u002Fp>\u003Cp>Instead of storing all transaction details, the block header contains summarized information that miners use during mining. It connects the block to the previous block and helps secure the blockchain.\u003C\u002Fp>\u003Cp>When miners perform mining calculations, they repeatedly hash the block header while changing the nonce value until they find a valid hash that meets the network difficulty requirement.\u003C\u002Fp>","\u003Ch2>\u003Cstrong>How Block Header Works\u003C\u002Fstrong>\u003C\u002Fh2>\u003Cp>The block header is created before mining begins and is included in every block.\u003C\u002Fp>\u003Cp>Here’s how the process works:\u003C\u002Fp>\u003Col>\u003Cli>\u003Cp>\u003Cstrong>Previous Block Hash\u003Cbr \u002F>\u003C\u002Fstrong> The header stores the hash of the previous block, linking blocks together into a blockchain.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>\u003Cstrong>Merkle Root\u003Cbr \u002F>\u003C\u002Fstrong> The Merkle Root summarizes all transactions included in the block.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>\u003Cstrong>Timestamp\u003Cbr \u002F>\u003C\u002Fstrong> The current block creation time is added.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>\u003Cstrong>Difficulty Target\u003Cbr \u002F>\u003C\u002Fstrong> The network difficulty determines how difficult it is to find a valid block hash.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>\u003Cstrong>Nonce Field\u003Cbr \u002F>\u003C\u002Fstrong> Miners continuously change the nonce value while hashing the block header.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>\u003Cstrong>Mining Process\u003Cbr \u002F>\u003C\u002Fstrong> Miners repeatedly hash the block header using Double SHA-256 until the resulting hash is lower than the target difficulty.\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Fol>\u003Cp>The Bitcoin mining condition is:\u003C\u002Fp>\u003Cp>\u003C\u002Fp>","\u003Ch2>\u003Cstrong>Example of a Block Header\u003C\u002Fstrong>\u003C\u002Fh2>\u003Cp>A Bitcoin miner creates a candidate block containing:\u003C\u002Fp>\u003Cul>\u003Cli>\u003Cp>transaction data\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>coinbase transaction\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>previous block hash\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003Cp>The miner then generates the block header and starts hashing it billions of times per second using ASIC miners.\u003C\u002Fp>\u003Cp>Each time the nonce changes:\u003C\u002Fp>\u003Cul>\u003Cli>\u003Cp>the block header hash changes\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>the miner gets a new chance to find a valid solution\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003Cp>Once a valid block hash is discovered, the block is broadcast to the network for verification.\u003C\u002Fp>","\u003Ch2>\u003Cstrong>Main Parts of a Bitcoin Block Header\u003C\u002Fstrong>\u003C\u002Fh2>\u003Cp>A Bitcoin block header contains:\u003C\u002Fp>\u003Cul>\u003Cli>\u003Cp>block version\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>previous block hash\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>Merkle Root\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>timestamp\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>difficulty target (bits)\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>nonce\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003Cp>The total size of a Bitcoin block header is 80 bytes.\u003C\u002Fp>",[],[],[],[53,56,59,62,65,68],{"answer":54,"question":55},"A block header is the section of a blockchain block containing important metadata used during mining and block verification.","What is a block header?",{"answer":57,"question":58},"A Bitcoin block header contains the block version, previous block hash, Merkle Root, timestamp, difficulty target, and nonce.","What information is stored in a Bitcoin block header?",{"answer":60,"question":61},"Miners repeatedly hash the block header during Proof of Work mining to search for a valid block hash.","Why is the block header important in mining?",{"answer":63,"question":64},"A Bitcoin block header is 80 bytes in size.","What is the size of a Bitcoin block header?",{"answer":66,"question":67},"Any change in the block header produces a completely different hash, forcing miners to restart mining calculations.","What happens if the block header changes?",{"answer":69,"question":70},"No. Miners mainly hash the block header rather than the full block transaction data.","Do miners hash the entire block?","Block Header in Bitcoin Mining: Definition and How It Works","What is a block header in Bitcoin mining? Learn how block headers store essential blockchain data, support Proof of Work mining, and secure Bitcoin blocks\n","published","2026-06-03T17:28:48.582Z","2026-06-03T17:28:45.930Z"]