A Bitcoin holder who goes by cprkrn on X just pulled off a recovery that most people would call impossible. After 11 years locked in an encrypted wallet, 5 BTC — worth nearly $400,000 at today's price of $79,622 — are back in their control. The key to unlocking it wasn't a commercial service or brute force. It was Anthropic's Claude AI.
How Claude cracked a decade-old wallet
The user had been sitting on an encrypted wallet file buried among old college computer files. Commercial recovery services wanted around $250 per attempt — and each one failed. Then cprkrn turned to Claude. The AI didn't just guess passwords. It found the encrypted file, debugged the open-source recovery tool btcrecover, and figured out that the tool was concatenating a sharedKey value with the user password during decryption. Once Claude flagged that, the keys decrypted on the first corrected run. The AI then converted them into Wallet Import Format (WIF), making the BTC spendable again.
The one missing piece
The recovery hinged on a mnemonic the user had rediscovered weeks earlier. Without that, even Claude couldn't have done it. But the AI's real win was diagnosing why btcrecover wasn't working — a bug that had stymied every previous attempt. It's a concrete example of general-purpose AI handling specialized cyber and debugging work that would normally require a developer with deep knowledge of Bitcoin internals.
Reaction and broader context
The recovery post on X exploded — over one million views in hours. Castle Island Ventures partner Nic Carter, crypto journalist Laura Shin, and Base creator Jesse Pollak all reacted with visible astonishment. Their surprise makes sense: according to Glassnode data, roughly one-third of all Bitcoin supply hasn't moved in years. A lot of that is probably lost. This case suggests AI could help chip away at that mountain, at least for people who still have fragments of their old files.
The user's advice to others? Upload everything from old machines and notebooks before giving up on lost wallets. That's the next concrete step — and a reminder that sometimes the answer was sitting in a drawer the whole time.
