# The Bitcoin whitepaper - Source document > Source: https://timechain.wiki/wiki/the-bitcoin-whitepaper-source-document · TimechainWiki, the Bitcoin encyclopedia. (source · history) > This is the source-document reference for *Bitcoin: A Peer-to-Peer Electronic Cash System* — Satoshi Nakamoto's nine-page whitepaper published October 31, 2008. A local PDF copy is embedded alongside this note; external authoritative copies are listed for verification and citation. For the publication-day narrative and historical reception, see [The Bitcoin whitepaper - History](https://timechain.wiki/wiki/the-bitcoin-whitepaper-history.md). For the chapter-by-chapter conceptual walkthrough, see [The Bitcoin whitepaper - Explainer](https://timechain.wiki/wiki/the-bitcoin-whitepaper-explainer.md). This page is the *primary-source archive* node of the whitepaper triad. --- ## The document !The Bitcoin whitepaper - Source document.pdf The embedded local PDF copy (`The Bitcoin whitepaper - Source document.pdf`) is the canonical archival reference; the external links below are listed for verification, citation, and version-comparison purposes. --- ## Where to access the whitepaper externally **Canonical hosted copies (recommended):** - **bitcoin.org/bitcoin.pdf** — the canonical primary hosting. The bitcoin.org domain was registered August 18, 2008 by Satoshi (treated in [The Bitcoin whitepaper - History](https://timechain.wiki/wiki/the-bitcoin-whitepaper-history.md)); the PDF at this URL is the version Satoshi linked from the original metzdowd-list announcement. - **bitcoincore.org/bitcoin.pdf** — mirror hosted by the Bitcoin Core project. - **nakamotoinstitute.org/library/bitcoin/** — Nakamoto Institute's library archive; includes formatted HTML version alongside PDF. **Archival hosting:** - **The metzdowd cryptography mailing list archive** (October 31, 2008 post) — the original announcement-and-link. Multiple mirrors preserve this archive. - **archive.org** — the Internet Archive holds multiple captures of bitcoin.org/bitcoin.pdf across the protocol's history; useful for verifying version invariance. **Local archival option:** - The PDF can be downloaded from bitcoin.org/bitcoin.pdf and archived locally for offline access and version-pinned reference. --- ## Bibliographic details - **Title:** *Bitcoin: A Peer-to-Peer Electronic Cash System* - **Author:** Satoshi Nakamoto (pseudonymous; see [Satoshi Nakamoto](https://timechain.wiki/wiki/satoshi-nakamoto.md)) - **Date:** October 31, 2008 - **Length:** 9 pages, 12 sections plus abstract and references - **First publication venue:** Posted to the metzdowd cryptography mailing list at 2:10 PM EST on October 31, 2008, with a link to a PDF hosted at bitcoin.org/bitcoin.pdf. - **License status:** No formal license attached; treated as effectively public-domain by the broader community given Satoshi's pseudonymous withdrawal and the absence of any rights-enforcement entity. --- ## Structure of the document For navigation purposes, the whitepaper's twelve sections are: 1. **Introduction** — frames the problem of trusted financial intermediaries. 2. **Transactions** — defines a transaction as a chain of digital signatures. 3. **Timestamp Server** — introduces chained-hash structure for tamper-evident history. 4. **Proof-of-Work** — integrates Hashcash-style proof-of-work into the timestamp server. 5. **Network** — describes the peer-to-peer broadcast protocol. 6. **Incentive** — introduces the block-reward mechanism for honest mining. 7. **Reclaiming Disk Space** — addresses pruning via Merkle-tree root retention. 8. **Simplified Payment Verification** — the SPV mechanism for scaling-via-light-clients. 9. **Combining and Splitting Value** — the transaction-output structure for sub-coin denominations. 10. **Privacy** — the pseudonymity-but-not-anonymity privacy framework. 11. **Calculations** — probabilistic-finality analysis (attacker hashrate share vs reversal probability). 12. **Conclusion** — two paragraphs closing without rhetorical flourish. **References cited:** Eight references including W. Dai ("b-money", 1998), A. Back ("Hashcash", 2002), H. Massias / X. S. Avila / J.-J. Quisquater (timestamp server, 1999), S. Haber / W. S. Stornetta (chained hashing, 1991), D. Bayer / S. Haber / W. S. Stornetta (efficient timestamping, 1993), R. C. Merkle (Merkle trees, 1980), and others. The deep textual treatment of each section's content is in [The Bitcoin whitepaper - Explainer](https://timechain.wiki/wiki/the-bitcoin-whitepaper-explainer.md); this source-document page is for archival access and quick navigation. --- ## Edition and translation notes The whitepaper has been translated into 40+ languages by community efforts; the multi-language hosting is at **bitcoin.org/en/bitcoin-paper** (with language-switcher). The English original is the canonical text; translations are useful for accessibility but should not be cited as the canonical version. The document has no published edition history — there is one canonical version, published October 31, 2008, unchanged since. Various typesetting and formatting variations exist across hosted copies, but the textual content is invariant. A widely-noted formatting curiosity: some hosted PDF versions have minor differences in pagination and spacing due to PDF-rendering differences. The text content is the same; the visual presentation varies marginally. --- ## How to cite this source **Standard citation form:** > Nakamoto, S. (2008). *Bitcoin: A Peer-to-Peer Electronic Cash System*. Retrieved from https://bitcoin.org/bitcoin.pdf **Specific-passage citation:** The document does not use line numbers or paragraph numbers. Section numbers (1-12) and abstract are the standard citation anchors. Page numbers vary across hosted versions and should not be relied upon for cross-version citation. --- ## Why this source matters This is the founding document of the entire Bitcoin project. Every other note derives — directly or indirectly — from claims made or implied in this nine-page PDF. The historical-narrative dimension of its publication is treated in [The Bitcoin whitepaper - History](https://timechain.wiki/wiki/the-bitcoin-whitepaper-history.md); the conceptual-explainer dimension is treated in [The Bitcoin whitepaper - Explainer](https://timechain.wiki/wiki/the-bitcoin-whitepaper-explainer.md); this source-document page is the *archival-access* dimension. Together the three pages form the whitepaper triad — the canonical exemplar of the naming-suffix convention codified in `_Brief.md` §3. --- ## Related notes - [The Bitcoin whitepaper - History](https://timechain.wiki/wiki/the-bitcoin-whitepaper-history.md) — publication-day narrative and reception - [The Bitcoin whitepaper - Explainer](https://timechain.wiki/wiki/the-bitcoin-whitepaper-explainer.md) — chapter-by-chapter conceptual walkthrough - [Satoshi Nakamoto](https://timechain.wiki/wiki/satoshi-nakamoto.md) — the founding-figure thinker page - [The Genesis Block](https://timechain.wiki/wiki/the-genesis-block.md) — the first concrete implementation, mined January 3, 2009 - [Cypherpunk movement](https://timechain.wiki/wiki/cypherpunk-movement.md) — the institutional and intellectual setting the document landed within - [Pre-Bitcoin attempts at internet money](https://timechain.wiki/wiki/pre-bitcoin-attempts-at-internet-money.md) — the prior-art lineage the whitepaper synthesizes - [Adam Back](https://timechain.wiki/wiki/adam-back.md) — Hashcash author, cited reference - [Wei Dai](https://timechain.wiki/wiki/wei-dai.md) — b-money author, cited reference - [Hal Finney](https://timechain.wiki/wiki/hal-finney.md) — first independent engager with the whitepaper - [History and origins](https://timechain.wiki/wiki/history-and-origins.md) — the parent sub-MOC - [Bit Gold - Nick Szabo](https://timechain.wiki/wiki/bit-gold-nick-szabo.md) — adjacent canonical source page (the closest pre-Bitcoin architectural antecedent) - [Shelling Out - Nick Szabo](https://timechain.wiki/wiki/shelling-out-nick-szabo.md) — adjacent canonical source page (monetary-emergence framework)