On 8 April 2026 the New York Times published an investigation by John Carreyrou arguing that the British cryptographer Adam Back is the most likely person behind Satoshi Nakamoto, the name that signed Bitcoin’s founding paper. Back answered on X the same day with a lower-case “i’m not satoshi”, and said his early interest in electronic cash explained the overlaps, TechCrunch reported. Two weeks later a documentary named two other men, both dead. Eighteen months earlier, an HBO film had named a fourth.
The record itself is shorter and firmer than the guessing. Bitcoin was announced on 31 October 2008 by someone writing as Satoshi Nakamoto, the network started on 3 January 2009, and its creator stopped posting in public in December 2010. Who Satoshi Nakamoto is has never been proved. Every person named so far has denied it, has died without being able to answer, or, in one case, was found by an English court not to be Satoshi.
Three things are kept apart below: what is on the record and can be checked by anyone, what has been claimed and by whom, and what nobody knows. What the paper itself says is the subject of our previous lesson, the Bitcoin white paper explained. Here the subject is the person behind it and the dates that followed, up to October 2026.
From a mailing list email to a live network: 2008 to 2010
On Friday 31 October 2008, at 14:10 New York time, a message titled “Bitcoin P2P e-cash paper” reached the subscribers of the Cryptography mailing list hosted at metzdowd.com. The sender signed Satoshi Nakamoto, wrote from an address at vistomail.com and opened with one line: “I’ve been working on a new electronic cash system that’s fully peer-to-peer, with no trusted third party.” The message, still in the list archive, linked to a PDF on bitcoin.org, a domain whose registration record gives 18 August 2008 as its creation date.
The audience was not random. That list was read by people who had spent the 1990s on digital cash, and the paper’s short reference list cites two of them: Adam Back’s Hashcash, a proof-of-work scheme against spam, and Wei Dai’s b-money proposal of 1998. Both men would later appear on lists of Satoshi candidates for exactly that reason. The earlier attempts are told in our guide to digital money before Bitcoin, and the mechanism Back pioneered is explained in the glossary entry on proof of work.
January 2009: the software and the first transfer
The first block of the chain, block 0, carries the timestamp 3 January 2009 at 18:15:05 UTC on the mempool.space explorer and holds a single transaction, the reward its miner created. A later lesson of this path is given over entirely to that block and the newspaper headline written into it.
Five days later, on Thursday 8 January 2009, Satoshi posted “Bitcoin v0.1 released” to the same mailing list. The first version was “Windows only for now”. Anyone who ran it joined the network as a node, and a menu option, “Generate Coins”, turned the same PC into a miner. In practice, for weeks, that meant a handful of people.
One of them was Hal Finney, a Californian programmer who had worked on the PGP encryption software and had built his own proof-of-work currency, RPOW. Block 170, timestamped 12 January 2009 at 03:30:25 UTC, contains two transactions: the miner’s reward and a payment of 10 BTC from Satoshi to Finney, the first transfer between two people on the network. Finney recalled it on the Bitcointalk forum on 19 March 2013: “I think I was the first person besides Satoshi to run bitcoin.” Satoshi, he added, had sent him ten coins as a test.
Pizza and an emergency fix: 2010
The first famous purchase came from a Bitcointalk user called laszlo, who on 18 May 2010 offered 10,000 bitcoins for “a couple of pizzas” delivered to his door. On 22 May he reported back: “I successfully traded 10,000 bitcoins for pizza.” The date is now celebrated as Bitcoin Pizza Day, and it is the best-known early purchase made with bitcoin.
Three months later the network hit the most serious bug of its early years. On 15 August 2010 block 74,638 included a transaction that created 184,467,440,737.09551616 BTC out of nothing, because a check on the sum of outputs overflowed. According to the Bitcoin Wiki account of the incident, a patched client was available within about five hours, miners switched to it, and the corrected chain overtook the faulty one at block 74,691, which mempool.space timestamps at 08:20 UTC on 16 August. The invalid coins vanished with the abandoned blocks. Satoshi was still at the controls, and the “safe mode” alerts added after the incident would be the subject of the last public post.
What the name Satoshi Nakamoto actually leaves behind
Strip away the speculation and the trail is made of text, code and coins. The text is the white paper, hundreds of forum posts on Bitcointalk and a handful on the P2P Foundation site, and the emails other developers later made public. The code is the first versions of the Bitcoin software, written in C++. The coins are the rewards of the early blocks, most of them never spent (see the estimate further down).
There is also a profile, and it is the part most often quoted as fact. The P2P Foundation account in Satoshi’s name said its owner was from Japan, as the Bitcoin Wiki page on Satoshi Nakamoto notes. A profile is what someone typed into a form. Nothing in the public record confirms the country, the age or the sex given there, and the investigations covered below have all looked well beyond Japan.
What the name does not leave behind matters as much. No photograph, no recorded voice, no legal document, no bank account. Above all, no message signed after 2011 with a key that is known to have belonged to Satoshi. That last gap is why the identity question has stayed open for so long, and why it could be closed in minutes if the right person ever chose to close it.
How Satoshi stepped away: December 2010 to April 2011
The last public post came on 12 December 2010, on Bitcointalk. It announced version 0.3.19 of the software, which added some protection against denial-of-service attacks and removed the “safe mode” alerts introduced after the August overflow bug. Satoshi was blunt about those alerts: “It was never intended as a long term feature.” After that, the account went silent on the forum.
By then much of the daily work had moved to the developer Gavin Andresen and a small group of contributors. Private emails continued for a few more months. On 23 April 2011 Satoshi wrote to Mike Hearn, another early developer: “I’ve moved on to other things. It’s in good hands with Gavin and everyone,” as Cointelegraph reported from the exchange Hearn later made public. Some accounts place a last message to Andresen a few days later, so the safest date is simply April 2011.
Why Satoshi left is not known. Stories circulate about pressure from intelligence agencies or fear of attention, but none of them rests on a document. The only explanation on record is the one in that email: other things.
What changed in practice is that nobody owns the project. The reference software, now called Bitcoin Core, is maintained by many volunteers and paid developers, and a change to the rules only takes effect when the people running nodes install it. Satoshi’s departure removed the last person whose word might have counted for more than the code.
Even the silence has been disputed. On 7 March 2014 at 01:17 UTC, the day after Newsweek named a Californian engineer as Satoshi, the dormant P2P Foundation account posted one line: “I am not Dorian Nakamoto.” The Satoshi Nakamoto Institute archive of that post warns that its authenticity “demands scrutiny”: the account was taken over through an email hack in September 2014, and nobody can show who typed the March message.
Satoshi Nakamoto candidates: who named them, and what they answered
Journalists, researchers, film-makers and anonymous bloggers have put forward many names over the years. The table below lists the main ones with who made each claim, when, on what basis, and the answer. None of the claims is proved, and Coindaro does not suggest that any of these people is Satoshi.
| Person | Named by (date) | Basis given | Answer or status |
|---|---|---|---|
| Dorian Nakamoto, engineer in California | Newsweek, Leah McGrath Goodman (6 March 2014) | His birth name and past engineering work | Denied through a lawyer, 17 March 2014 |
| Hal Finney | Andy Greenberg, Forbes (25 March 2014), as a possible ghostwriter | Had lived in the same town as Dorian Nakamoto; a style comparison | Denied; Greenberg concluded he was telling the truth. Died 28 August 2014 |
| Nick Szabo | Nathaniel Popper, New York Times (May 2015) | His bit gold design; what Popper heard from developers | Denied, to Popper and in emails |
| Craig Wright | Wired (8 December 2015) and Gizmodo (9 December 2015); then his own public claim (2 May 2016) | Documents he supplied | High Court of England and Wales, 2024: not Satoshi; documents forged |
| Dave Kleiman | Gizmodo (December 2015), as Wright’s partner | Documents from Wright’s side | Died 26 April 2013; a US jury found in 2021 he was not Wright’s partner in creating Bitcoin |
| Peter Todd | HBO film Money Electric, Cullen Hoback (8 October 2024) | A 2010 forum post | Denied: “For the record, I’m not Satoshi” |
| Adam Back | New York Times, John Carreyrou (8 April 2026) | Hashcash; writing habits in mailing-list archives | Denied on X, 8 April 2026 |
| Hal Finney and Len Sassaman together | Film Finding Satoshi (22 April 2026) | Elimination of other suspects; online-activity profile | Both dead; Finney had denied in his lifetime |
Each row comes from the report or court record linked in the sections below. Other names have circulated too, among them Wei Dai, whose b-money proposal the white paper cites.
Dorian Nakamoto: the cost of a wrong name
The 2014 Newsweek cover story is the clearest case of a claim that went wrong. It identified a 64-year-old former engineer named Dorian Prentice Satoshi Nakamoto, as Forbes later summed it up. On 17 March 2014 his lawyer issued a statement that he “did not create, invent or otherwise work on bitcoin“. No evidence published since has tied him to the project. Reporters went straight to his house after the story; weeks later Fran Finney asked, through Forbes, that the media not do the same to her husband.
Hal Finney and Len Sassaman
Finney is on most lists because he was there from the first week: the first person to run the software after Satoshi and the first to receive coins. In March 2014 Andy Greenberg of Forbes looked at whether Finney could have written for Satoshi, after a tip that Finney had lived for almost a decade in the same town as Dorian Nakamoto and after a writing comparison by the consultancy Juola & Associates. Finney, by then living with ALS, denied it. His family showed Greenberg about fifteen emails exchanged with Satoshi in January 2009, mostly bug reports and fixes, and Greenberg wrote that he believed Finney was telling the truth. Finney died on 28 August 2014.
Len Sassaman, a privacy developer who, like Finney, worked on PGP and who died in 2011, has been suggested on forums for years. The documentary Finding Satoshi, released on 22 April 2026 and directed by Tucker Tooley and Matthew Miele, went further: after a four-year investigation led by the writer William D. Cohan and the private investigator Tyler Maroney, it argues that Finney wrote the code and Sassaman the prose, Decrypt reported. Its method is mainly elimination: a data scientist compared suspects’ online activity with Satoshi’s, and the profile fitted the two men. The film includes Finney’s widow, Fran, who concedes that her husband probably played a role. It also has to deal with a point raised by Jameson Lopp, chief technology officer of Casa: Satoshi was emailing a developer while Finney was running a race in Santa Barbara. The film reads that as support for its two-author theory. Neither man can answer.
Nick Szabo and Adam Back
Both men designed something close to Bitcoin before Bitcoin. Szabo designed bit gold, a Bitcoin predecessor built from similar cryptographic tools; Back built Hashcash, which the white paper cites. In May 2015 Nathaniel Popper of the New York Times wrote that he had met among developers a “quiet but widely held belief” that the most convincing evidence pointed to Szabo. In the same article, Popper reported that Szabo denied being Satoshi, as he had consistently done in emails.
Back’s turn came in April 2026. Carreyrou gathered the archives of three cryptography mailing lists from 1992 to 2008 and used AI tools to compare the writing of their posters with Satoshi’s, looking at habits such as not hyphenating compound nouns and mixing up “its” and “it’s”. Back, today co-founder and chief executive of the company Blockstream, came out as the best match. TechCrunch noted that the report has no undeniable evidence to seal the case.
Back said he was not Satoshi, traced his interest to the cypherpunk mailing list from about 1992, where Hashcash was born, and wrote that he does not know who Satoshi is, CoinDesk reported. He also argued that a man who posted as much as he did is simply easier to match. Others were unconvinced too: the Bloomberg columnist Joe Weisenthal said he was “not 100% convinced by the evidence or the conclusion”, and the early bitcoiner Nicholas Gregory warned that unmasking Satoshi could put that person and their family at risk.
Peter Todd and the HBO film
Money Electric: The Bitcoin Mystery, directed by Cullen Hoback, aired on HBO on 8 October 2024. Its case against the Bitcoin Core developer Peter Todd rests mainly on a 2010 Bitcointalk post by Todd that Hoback concludes was really written by Satoshi. Todd told CNN in a statement: “For the record, I’m not Satoshi.” He called the film “irresponsible”, said it put his life in danger, said he was not offered a chance to see it before it aired and described the forum post as “a minor correction to what Satoshi wrote”, CNN reported. Hoback told CNN he remained confident in his conclusion.
Craig Wright: the only claim tested in court
Craig Wright, an Australian-born computer scientist, is the one candidate who said he was Satoshi, and the one claim a court has tried. After Wired and Gizmodo pointed to him on 8 and 9 December 2015, he claimed the title publicly on 2 May 2016 and later brought legal actions on that basis in several countries. The Crypto Open Patent Alliance (COPA) asked the High Court in London to declare that he was not Satoshi.
After a trial that ran from 5 February to 14 March 2024, Mr Justice Mellor ruled from the bench on 14 March 2024 and handed down his written judgment in COPA v Wright on 20 May 2024. It declares that Wright is not the author of the white paper, did not operate under the name Satoshi Nakamoto between 2008 and 2011, did not create the Bitcoin system and is not the author of the first versions of the software. The judge found that Wright “lied to the Court extensively and repeatedly” and that documents had been “forged on a grand scale by Dr Wright”.
The case kept going. On 16 July 2024 the judge said he would send the papers to the Crown Prosecution Service, which must decide whether to bring charges for what he called “wholescale perjury and forgery of documents”, The Block reported. On 19 December 2024, after Wright filed a new claim against Bitcoin developers in breach of a court order, Mellor gave him 12 months in prison suspended for two years for contempt, the Law Society Gazette reported; Wright said he would appeal. In the United States, a federal jury in Florida had already ruled in the case brought by Dave Kleiman’s estate: on 6 December 2021 it rejected the claim that Kleiman was Wright’s partner in creating Bitcoin, but found Wright liable for conversion and awarded $100 million to W&K Info Defense Research, the company the two men had shared, The Block reported. The London ruling settles that Wright is not Satoshi. It says nothing about who is.
Why writing style and coincidences cannot settle it
Most claims use the same two tools: stylometry, which compares word choices, spelling and punctuation, and circumstance, such as who was online when, who knew whom, who had the skills. Both produce suspects, not proof. The pool of people who wrote about digital cash in the 1990s was small, they read the same lists and borrowed each other’s phrases, and several investigations have reached different people: Szabo in 2015, Todd in 2024, Back and then Finney with Sassaman in 2026. Back himself put the overlaps down to coincidence and similar phrases among people with similar backgrounds.
The one proof that would settle it
Bitcoin offers a test that no article can match. Each early block reward was paid to an address controlled by a private key. Whoever holds the key of a coin mined in January 2009 can sign a short message with it, and anyone can check the signature against the public address in seconds. Satoshi has never done this in public. Neither has any candidate. Wright staged private signing sessions in 2016; the 2024 judgment examined them at length and still found his claim false and the documents behind it forged.
Even a valid signature would prove less than people assume. It would show that someone controls a key, not that the same person wrote the white paper; keys can be shared, sold, inherited or stolen. Combined with old emails and code, it would still be the strongest evidence anyone has produced.
Until then, the open questions are these:
- Who Satoshi was, and whether the name covered one person or several, as the 2026 film Finding Satoshi argues.
- Nationality, age and gender: the only details come from a forum profile that nobody can verify.
- Whether Satoshi is still alive.
- Whether the early coins can still be moved, or whether the keys are lost.
How many bitcoins Satoshi may hold, and why it is an estimate
In the first year almost nobody mined, so one machine running steadily could win most of the blocks. On 17 April 2013 the security researcher Sergio Lerner published an analysis of the counters miners wrote into each early block reward. He found a long series of blocks with the same distinctive pattern, which he attributed to a single entity, probably Satoshi, that began blockchain e riceve una ricompensa, rendendo carissimo riscrivere lo storico.">mining from block 1 and had not spent its coins. Looking at blocks 0 to 36,288, he estimated that fortune “at eyesight” at around one million bitcoins.
Lerner was careful to say he could not be fully certain that every block in the pattern belonged to that one miner, and that his count rested on assumptions about the data. The pattern was later nicknamed “Patoshi”. In later work Lerner put its haul at around 1.1 million BTC from some 22,000 blocks, while other studies arrived nearer 750,000, Cointelegraph Magazine summarised in 2021. Lerner has said 99.9% of those blocks have never been spent. For scale, the protocol caps the supply at 21 million, as our guide to what bitcoin is explains, so the estimate covers roughly 3.6% to 5.2% of all the coins that will ever exist.
The key word is estimate. The coins sit in thousands of separate addresses, no one has signed with any of them, and the link to Satoshi rests on a statistical pattern. If those coins ever moved, every explorer would show it within minutes, but the movement alone would not reveal who moved them. This lesson gives no dollar value for the holding: it depends on a price that changes every minute and on an attribution nobody has proved.
Bitcoin history timeline: key dates from 2011 to 2026
After Satoshi left, the history became that of a network, its users and its regulators. The table keeps to dates that are documented; times are from the mempool.space explorer, checked on 23 October 2026. For the wider picture, with Ethereum, stablecoins and the market cycles, see our crypto history timeline. The halvings are explained in the glossary entry on the bitcoin halving.
| Date | Event | Why it matters |
|---|---|---|
| April 2011 | Satoshi’s last known emails | End of all known contact with the creator |
| 19 June 2011 | A compromised account at the Mt. Gox exchange crashes the price there from about $17 to pennies within minutes | First major exchange security failure |
| 28 November 2012, 15:24:38 UTC | First halving, block 210,000: reward cut from 50 to 25 BTC | The supply schedule works as written |
| 11 to 12 March 2013 | A large block mined with version 0.8, at height 225,430, is rejected by older versions and the chain splits | Ended when large pools went back to version 0.7 |
| 17 April 2013 | Sergio Lerner publishes the early-mining pattern | Basis of every Satoshi holdings estimate |
| 1 to 2 October 2013 | Ross Ulbricht is arrested in San Francisco and the FBI shuts down the Silk Road marketplace | A landmark US enforcement case involving bitcoin |
| February 2014 | Mt. Gox pauses withdrawals early in the month and on 28 February files for bankruptcy protection in Tokyo, saying 850,000 bitcoins are lost | The biggest exchange of its time fails |
| 6 March 2014 | Newsweek names Dorian Nakamoto | The first mass-media unmasking, and a wrong one |
| 9 July 2016, 16:46:13 UTC | Second halving, block 420,000: 25 to 12.5 BTC | |
| 1 August 2017 | Bitcoin Cash splits off; SegWit activates on 24 August at block 481,824 | The block size dispute ends in two chains |
| 11 May 2020, 19:23:43 UTC | Third halving, block 630,000: 12.5 to 6.25 BTC | |
| 8 to 9 June 2021 | El Salvador’s assembly passes a law making bitcoin legal tender | First country to do so; a January 2025 amendment ended mandatory acceptance |
| 14 November 2021, 05:15:27 UTC | Taproot upgrade activates at block 709,632 | First major rule upgrade since SegWit |
| 10 January 2024 | The SEC approves spot bitcoin exchange-traded products | US investors gain regulated exposure through brokers |
| 14 March 2024 | High Court rules that Craig Wright is not Satoshi | Written judgment follows on 20 May 2024 |
| 20 April 2024, 00:09:27 UTC | Fourth halving, block 840,000: 6.25 to 3.125 BTC | |
| 8 October 2024 | HBO film names Peter Todd, who denies it | |
| 4 to 5 December 2024 | Bitcoin trades above $100,000 for the first time (late on 4 December, US time) | |
| Early October 2025 | New record above $125,000, reported by Reuters on 5 October (peak figures differ by data source) | |
| 8 April 2026 | New York Times names Adam Back, who denies it | |
| 22 April 2026 | Film Finding Satoshi names Hal Finney and Len Sassaman | |
| Expected 2028 | Fifth halving at block 1,050,000: 3.125 to 1.5625 BTC | The chain stood at block 972,746 on 23 October 2026 |
A few rows deserve a sentence more. The March 2013 split is a reminder that a software change can divide the network by accident: the Bitcoin.org notice of 11 March 2013 told ordinary users to do nothing while large pools reverted. The Mt. Gox collapse taught a lesson that still holds: coins left on a platform belong, in practice, to whoever controls that platform’s keys, as our guide to how centralized exchanges work explains. The El Salvador change of January 2025 followed a loan agreement with the IMF. And on 10 January 2024 SEC chair Gary Gensler opened his statement with: “Today, the Commission approved the listing and trading of a number of spot bitcoin exchange-traded product (ETP) shares.” Those products, close cousins of the ETFs sold on stock markets, let US investors get exposure to bitcoin through an ordinary brokerage account, and none of them depends on knowing who designed it.
What not knowing the creator means for you
For someone using bitcoin, the missing name changes less than it seems. There is no company to sue, no founder who can freeze an account and no headquarters to raid. The rules sit in software that thousands of people run, and they change only when enough of them adopt a new version. If Satoshi reappeared tomorrow, he or she would have the same power as any other developer: to propose code that others may ignore. The early coins are the exception, because selling a large amount would be a market event, which is one reason analysts watch those addresses.
The mystery does create one practical risk: impersonation. Anyone who presents as Satoshi, or as a confidant of Satoshi, and offers a deal, a token, a giveaway or an “early access” scheme is showing a classic warning sign. Wright’s case shows how far a false claim can go, with forged documents and years of lawsuits, even before money changes hands. Our guide on how to avoid crypto scams lists the patterns to recognise.
For readers in the United States, the legal side of bitcoin does not depend on its author either. The SEC oversees the exchange-traded products it approved in 2024, and the IRS states on its digital assets page that for US tax purposes digital assets are considered property, not currency. British readers have the one court ruling on the identity question: COPA v Wright was decided in London. This lesson is history, not investment or tax advice.
The next lesson of this path goes back to the first day: block 0, the message its creator wrote into it, and the financial crisis of 2008 that frames it.
