Claude Helps Recover $395,000 in Bitcoin by Finding a Forgotten Wallet Backup

Image Credit: Shutterstock

A Bitcoin holder used Anthropic’s Claude to recover roughly $395,000 after eight weeks of failed brute-force attempts. It helped the owner search an old computer for a forgotten wallet backup file, which was then unlocked with a password the owner had already written down in a notebook.

How Claude Actually Found the Bitcoin

User cprkrn posted the recovery on Wednesday, describing how they had spent eight weeks trying to brute-force the password on their current Blockchain.com wallet. The effort involved testing roughly 3.5 trillion password combinations using the btcrecover service. None of the attempts worked.

The breakthrough came when the user uploaded the contents of an old college computer to Claude as a last resort. The AI assistant located a wallet backup file from December 2019 that the user had forgotten existed. The file was encrypted, but the password turned out to be one the user had already written in a physical notebook.

The old backup contained the same private keys as the current wallet, since Bitcoin private keys do not change between backups. The password unlocked the file, and the user recovered 5 BTC, worth approximately $395,000.

“The most obvious opening ever,” cprkrn wrote on X once they realized what had happened.

In a follow-up post tagging Anthropic chief executive Dario Amodei, the user added:

“THANK YOU @DarioAmodei NAMING MY KID AFTER YOU.”

Claude Did Not Crack Any Cryptography

Claude performed what amounted to a file search across years of accumulated drive contents, identifying a backup the user did not know was there. It did not crack, decrypt, or brute-force anything.

Breaking Bitcoin’s actual cryptography would require either a working quantum computer running Shor’s algorithm against the elliptic-curve keys or a fundamental flaw in the cryptographic scheme that has not been found in 16 years of public scrutiny. Most researchers place the arrival of a cryptographically relevant quantum computer at least five to ten years out.

The user disclosed the password on X as “lol420fuckthePOLICE!*:)”, a string that brute-force tools could eventually have found, but not within the password space and timeframe the user was testing against the wrong wallet file.

AI Makes Wallet Backup Hunting Easier Than Brute-Forcing Passwords

The recovery highlights a practical use case for AI tools in crypto that does not involve breaking security. Recovery tools like btcrecover have existed for years to help users test password variations against encrypted wallet files. The barrier has always been the technical expertise required to search old hardware, identify candidate backup files, and narrow the password space.

AI assistants like Claude can compress that process. Instead of manually sorting through folders, timestamps, and file types across years of drive clutter, an owner can hand the search to a language model that can identify patterns and surface likely wallet files.

Millions of Bitcoin are believed to remain inaccessible because owners lost passwords, drives, or recovery phrases during the early years when the coins had little value. With Bitcoin trading near $79,000, forgotten hardware in a closet could hold six figures.