In a span of just 14 days, two of the most prominent investigations ever undertaken into the identity of Bitcoin’s pseudonymous creator have landed on completely different answers—setting up what may become the sharpest debate the crypto industry has had about Satoshi Nakamoto in years.
On April 8, 2026, Pulitzer Prize-winning journalist John Carreyrou — best known for exposing the Theranos fraud — published an 18-month New York Times investigation concluding that British cryptographer and Blockstream CEO Adam Back is the most likely candidate to be Satoshi. On April 22, a documentary titled ‘Finding Satoshi’ premiered with the opposite conclusion: Bitcoin was the work of two people collaborating under one pseudonym—Hal Finney and Len Sassaman, both of whom are deceased.
Both investigations are substantial. Both involve extensive interviews, forensic linguistic analysis, and multi-year timelines. And yet their conclusions could not be more different.
What ‘Finding Satoshi’ Claims
The documentary, directed by Tucker Tooley and Matthew Miele and following a four-year investigation by author William D. Cohan and private investigator Tyler Maroney of Quest Research & Investigations, reaches the conclusion that Satoshi was never a single person.
“For the entire investigation, we’ve been pursuing Satoshi as if he were one person. But all of our evidence is leading to the conclusion that it was two people collaborating,” Maroney says in the film. The team’s theory: Hal Finney, the legendary cypherpunk and PGP contributor who received Bitcoin’s first-ever transaction, wrote the code. Len Sassaman, another PGP veteran whose PhD advisor was cryptography pioneer David Chaum, handled the writing—including the Bitcoin whitepaper itself.
The evidence base is notably different from Carreyrou’s. Data scientist Alyssa Blackburn — known for her earlier “Patoshi” mining-pattern research — analyzed Satoshi’s early mining and communications activity and found it clustered between 6 a.m. and 10 p.m. PST, a pattern she argued matches only Finney and Sassaman among six credible candidates (Adam Back, Nick Szabo, Hal Finney, Len Sassaman, Paul Le Roux, and Wei Dai). On that basis, Blackburn called it “inconceivable” that Back, Szabo, or Dai could be Satoshi.
Further testimony came from PGP Corp. co-founder Will Price, who worked with Finney for 15 years and flagged a two-month gap before Bitcoin’s genesis block during which Finney made no commits to his own projects. BitTorrent creator Bram Cohen, a close friend of both men, told the filmmakers their “interests and habits matched Satoshi’s profile precisely” and explained Sassaman’s public criticism of Bitcoin as a deliberate deflection to avoid detection.
Sassaman died by suicide in July 2011, roughly six months after Satoshi’s last known public post. Finney died from ALS complications in 2014. Sassaman’s widow, Meredith L. Patterson, appears in the documentary assessing whether her husband could have been Satoshi. The filmmakers note there is no evidence that either Fran Finney or Patterson has access to Satoshi’s private keys.
What the NYT Investigation Claimed
Carreyrou’s piece, published in partnership with Times AI editor Dylan Freedman, leaned heavily on computational linguistic analysis. The pair ran Satoshi’s 325 instances of nonstandard hyphenation against the writing of 620 people who had posted at least 10 times to pre-2008 cryptography mailing lists. Back-matched 67 of those exact errors—a striking statistical signal.
The circumstantial case was equally pointed. Back went nearly silent on the Cryptography mailing list during the years Satoshi was active, resurfacing six weeks after Satoshi vanished in 2011. A decade before Bitcoin, his posts had already outlined distributed nodes, Hashcash-based coin minting, inflation adjustment, and immutable timestamping. Carreyrou also recounted a moment at a 2026 conference in El Salvador when Back, quoting a Satoshi line about being “better with code than with words,” responded, “I did a lot of talking though for somebody, I mean…” — which Carreyrou interpreted as Back momentarily speaking as Satoshi.
Back has repeatedly and firmly denied the claim. In a post on X following the article, he wrote, “I’m not Satoshi.” Blockstream called the report “circumstantial interpretation of select details and speculation, not definitive cryptographic proof.”
Where the Evidence Diverges
The most telling split between the two investigations is methodological.
Carreyrou’s case is built primarily on linguistic and behavioral pattern-matching—hyphenation, phrasing, mailing-list timing, and in-person tells. It points to a living suspect with ongoing industry ties, including a Bitcoin treasury company currently going public via a Cantor Fitzgerald SPAC merger.
Finding Satoshi’s case is built primarily on timezone analysis, domain expertise, and eyewitness testimony from Finney’s and Sassaman’s contemporaries. It points to two deceased suspects, neither of whom can be sued, subpoenaed, or contradicted.
That distinction has not gone unnoticed. Security researcher Jameson Lopp, who previously authored an article titled “Hal Finney Was Not Satoshi Nakamoto,” now calls the documentary “easily the most expertly produced Bitcoin documentary” he has seen and “a plausible take that may finally put an end to chasing ghosts.”
Coinbase CEO Brian Armstrong, whose exchange gave its users 24-hour early access to the film, said it’s “the most thoughtful take on this subject I’ve seen out there.”
The documentary also acknowledges counter-evidence. Satoshi exchanged emails with a developer at the same time Finney—an avid runner—was participating in a race in Santa Barbara. The filmmakers treat this as support for their co-author theory: Finney writing code, Sassaman writing words.
What’s at Stake for Bitcoin
Beyond the historical curiosity, the two theories carry very different implications for markets. Satoshi is believed to control roughly 1.1 million BTC that have never moved. If Carreyrou is correct, those keys are theoretically in the hands of a living, still-active Bitcoin figure—an open question about future supply. If Finding Satoshi is correct, those coins are effectively lost forever, a permanent deflationary feature of Bitcoin’s monetary base.
Neither investigation offers cryptographic proof—the only form of evidence that could actually end the debate, namely a signed message or a single-satoshi movement from one of the known Satoshi-era wallets. Until that happens, the question of who Satoshi Nakamoto was is likely to remain what it has been for the last 17 years: a matter of interpretation, not fact. But for the first time in a long time, the interpretations on offer are genuinely competing.
Also Read: Fact Check: Is Adam Back Really Bitcoin Founder Satoshi Nakamoto?
