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New documentary argues Hal Finney and Len Sassaman helped create Bitcoin

A documentary released Wednesday says Satoshi Nakamoto was a shared pseudonym used by Hal Finney and Len Sassaman, with the filmmakers citing a four-year investigation into Bitcoin’s code and white paper authorship.

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Fact Check
The claim is likely true in the limited sense that a documentary released on Wednesday argued Hal Finney and Len Sassaman helped create Bitcoin under the Satoshi Nakamoto name. This is directly supported by The Block's X post (https://x.com/TheBlockCo/status/2046937345300013083), which summarizes the documentary and mentions a four-year investigation, and by the Odaily newsflash '纪录片寻找中本聪： Hal Finney 与 Len Sassaman 或为比特币共同创作者,' which says the film was released Wednesday and advances the same shared-pseudonym thesis. Independent corroboration appears in search results for both The Block article and Decrypt's report ''Finding Satoshi' Makes the Case for Hal Finney, Len Sassaman as ...'. Confidence is medium rather than high because no direct primary source from the documentary producers or the documentary itself was fetched in this run, so the evidence confirms reported publication and argument, not the underlying historical conclusion about Bitcoin's creation.
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Summary

A documentary released Wednesday argues that Bitcoin creator Satoshi Nakamoto was not a single person but a shared pseudonym used by Hal Finney and Len Sassaman. Directors Tucker Tooley and Matthew Miele said their four-year investigation concluded that Finney wrote Bitcoin’s code while Sassaman handled text, including the Bitcoin white paper. Fran Finney also said Hal Finney may have been involved in Bitcoin’s creation. The film adds new detail to longstanding speculation over the identity behind Satoshi Nakamoto by explicitly dividing Bitcoin’s technical and written authorship between the two men.

Terms & Concepts
  • Satoshi Nakamoto: The pseudonymous name associated with Bitcoin’s creator or creators and the author of the original Bitcoin white paper.
  • Bitcoin: A decentralized digital currency launched in 2009 that operates without a central authority using blockchain-based transaction records.
  • white paper: A foundational document that explains a project’s design, purpose, and mechanics; for Bitcoin, it outlined how the system would work.