A Bitcoin holder (cprkrn) just used Claude to recover access to a wallet he'd been locked out of for over 11 years. He bought the bitcoin around 2014 when it was roughly $250 each. At some point he got stoned and changed his password, then could never get back in. He tried what he describes as "7 trillion passwords" over the years. Nothing worked. A few weeks ago he found an old mnemonic from before he changed the password. He thought he was still out of luck because the wallet file had been updated with the new password. As a last resort, he dumped his entire old college computer's files into Claude. Claude found an older version of the wallet file buried in the data. The original mnemonic successfully decrypted it. Claude identified a bug in how the wallet software concatenated the shared key and password, ran btcrecover with the correct algorithm, extracted the private keys, and converted them to WIF format. The address (14VJySbsKraEJbtwk9ivnr1fXs6QuofuE6) received a total of 16.95 BTC over its lifetime. At today's prices, that is worth over $1.7 million. The wallet has since been emptied, meaning he likely moved the funds to a new wallet he controls. He paid around $250 per coin. He recovered them at over $100,000 per coin. An AI model did in one session what 11 years of manual attempts could not.