Someone Recovered $400,000 in Bitcoin Lost for 11 Years by Uploading Old Files to Claude

[johnblockbuster]

A Bitcoin holder posting as cprkrn on X recovered 5 BTC — worth approximately $400,000 at current prices — from a wallet locked since his college years after uploading old computer files to Anthropic's Claude as a last resort. Previous attempts with commercial recovery services had cost roughly $250 per failed run before he turned to AI. The recovery process Claude executed was technically precise: the model located an encrypted wallet file buried in the dumped data, identified that the open-source recovery tool btcrecover concatenates a sharedKey value with the user password during decryption, debugged the logic, and converted the private keys to Wallet Import Format on the first corrected run. The breakthrough hinged on a mnemonic cprkrn said he had rediscovered weeks earlier — the original password set in college and changed shortly after, leaving the wallet stranded for over a decade. "Last ditch effort dumped my whole college computer into Claude. It found an OLD wallet file that the mnemonic successfully decrypted," he posted.

The recovery drew over one million views within hours and reactions from Castle Island Ventures partner Nic Carter, crypto journalist Laura Shin, and Base creator Jesse Pollak. The case has attracted attention beyond the dollar figure because it demonstrates something that experts say represents a genuine capability shift: general-purpose AI handling specialized cybersecurity debugging work that previously required either deep technical expertise or expensive commercial services. Roughly a third of all Bitcoin supply sits in wallets that have not moved in years according to Glassnode data, and the implication of this recovery is that some portion of that dormant supply may be accessible to holders who kept files from earlier machines. cprkrn's advice to others is direct: upload everything from old computers and notebooks before giving up.

[lingriiddd]

"Upload everything before giving up" is the most actionable crypto recovery advice of 2026

[lingriiddd]

One third of Bitcoin supply in dormant wallets combined with this case will prompt significant recovery attempt volume from old hardware searches