A Bitcoin holder who had been unable to access his wallet for over 11 years successfully retrieved approximately 5 BTC, now valued between $400,000 and $500,000, by leveraging Anthropic’s Claude AI to overcome a long-standing technical obstacle. The recovery concluded in May 2026, ending more than a decade of failed attempts that included expensive professional services and exhaustive password guessing efforts.
The Bitcoin owner, known on social media as @cprkrn, initially lost access after changing his wallet password while intoxicated during his college years and then forgetting the new credentials. Though he retained an old mnemonic phrase—a set of words used to restore wallets—it no longer worked to open the current wallet file. Conventional methods for recovery, including brute force attacks testing trillions of password combinations and spending hundreds of dollars on recovery specialists, proved fruitless.
The turning point came when the user uploaded a full archive of his old college computer’s data—encompassing files, documents, notes, and backups—into Claude AI. Instead of cracking encryption, Claude performed a forensic analysis by sifting through the historical data to pinpoint an older wallet file predating the password change. The AI uncovered a bug in btcrecover, a popular open-source Bitcoin wallet recovery tool, which mishandled the order of concatenating a shared key with the password. Claude corrected this decryption process, successfully extracting the wallet’s private keys in Wallet Import Format.
The recovered keys led to immediate wallet activity on the blockchain, confirming the transfer of the 5 BTC after years of inactivity dating back to 2015. The wallet address involved had shown no outbound movements until this recovery event. This breakthrough demonstrated that the problem lay not in Bitcoin’s encryption but within software tools commonly used for wallet recovery.
The story went viral quickly after @cprkrn shared his experience on X, garnering millions of views and reactions from well-known figures in the cryptocurrency community. He also provided a detailed explanation to assist others facing similar issues, emphasizing the value of thorough data collection and forensic analysis over blind password guessing.