What is Genesis Block?
The genesis block is block 0 — the first block of a blockchain, hard-coded into the protocol. Bitcoin's genesis block, mined by Satoshi on 3 January 2009, contains the now-famous headline 'Chancellor on brink of second bailout for banks'.
Why Genesis Block matters
Understanding Genesis Block is part of building a solid mental model of how Bitcoin, blockchain and Web3 systems actually work. Concepts in the Blockchain category sit at the foundation of the broader stack — get them right and the rest is far easier.
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Related terms
- Block — A bundle of transactions added to the blockchain.
- Blockchain — A chained, append-only ledger of blocks.
- Satoshi Nakamoto — Bitcoin's pseudonymous creator.
More blockchain terms
- Consensus Mechanism — The rules a network uses to agree on the canonical chain.
- Fork — A divergence in the blockchain or its rules.
- Node — A computer participating in the blockchain network.
- Proof of Stake — A consensus mechanism where validators stake capital instead of burning energy.
- Reorganization (Reorg) — Replacing recent blocks with a competing chain that has more work.
- Transaction — A signed instruction that updates the blockchain state.
- Block Time — Average interval between consecutive blocks.
Keep exploring
Continue with the full blockchain glossary — 136 terms in total — or read the developer blog and FAQ for deeper context.