Cryptocurrency · 2009
The Genesis Block
Block 0 · 3 January 2009, 18:15:05 UTC · 285 bytes · one transaction
The 285 bytes of the first Bitcoin block, in hexadecimal, with every field of its header and coinbase transaction labelled.
Read the text The whole poster as a web page
- Print from
- A2
- License
- MIT (compilation); data: Bitcoin Core (MIT)
- Source
- github.com
- Retrieved
- 27 September 2026
- Language
- English
- Rights holder
- one-page-papers (layout); Satoshi Nakamoto and The Bitcoin Core developers (chainparams.cpp)
Theme
Download
- A seriesPrints at A0, A1, A2 or A3
- 50 × 70 cm
- 60 × 80 cm
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Print from A2: the smallest A size at which the body text is at least 8 pt.
Wallpaper
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Edition
An original layout for this project. The bytes come from CreateGenesisBlock in src/kernel/chainparams.cpp of Bitcoin Core at commit ed7dd7c of 25 September 2026 (SHA-256 of the file cfadf1478377c32625280520655b598674e6d487f08d7f7a80ac69252104b5e1): the arguments of the main network (time 1231006505, nonce 2083236893, bits 0x1d00ffff, version 1, reward 50 * COIN), the timestamp text pszTimestamp, the output public key, and the construction of the coinbase script (486604799, then CScriptNum(4), then the text); COIN is 100,000,000 (src/consensus/amount.h at the same commit). A script serialized the block from these values (285 bytes); its merkle root and block hash equal the two values that chainparams.cpp asserts, and its coinbase script equals the one in the comment above the function. The 285 bytes are identical to the raw block served on 27 September 2026 by https://blockstream.info/api/block/000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f/raw and by https://mempool.space/api/block/000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f/raw (SHA-256 of the bytes 5299fac924b5a2fc19a88876a0042c19ac4d11fe69c3f66e47516e26185f9e99), and the first 80 to the header served by blockstream.info. Every decoded value on the poster (date in UTC, target, hashes, amounts) is computed from the bytes by the same script; the difficulty follows GetDifficulty in src/rpc/blockchain.cpp at the same commit. The quotations of the source (the timestamp text and the remark that the output “cannot be spent since it did not originally exist in the database”) are copied from the file. The explanations are written for the poster.
Rights
chainparams.cpp: “Copyright (c) 2010 Satoshi Nakamoto / Copyright (c) 2009-present The Bitcoin Core developers / Distributed under the MIT software license, see the accompanying file COPYING or http://www.opensource.org/licenses/mit-license.php.” COPYING: “Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction [...] subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.”
The layout, the labels and the explanations are an original work under the MIT license of this repository. The bytes are the values of CreateGenesisBlock in Bitcoin Core (https://github.com/bitcoin/bitcoin/blob/master/src/kernel/chainparams.cpp, MIT, COPYING at https://github.com/bitcoin/bitcoin/blob/master/COPYING), whose copyright lines the footer carries; the same bytes are public data of the Bitcoin block chain, served by any node and block explorer. The newspaper headline in the coinbase is quoted as it appears in the block.
