A man known online as @cprkrn sat in front of his computer sometime in mid-May and entered something into Claude that sounded more like a prayer than a prompt. For eleven years, he had been dealing with this issue. He bought back five bitcoins when they were trading close to $250, but they were locked behind a password he had set one foggy night in college—possibly while high—and had largely forgotten the following morning. Those five coins were valued at nearly $400,000 by 2026. That’s how cruel the math is.
The money isn’t really what makes the story compelling. It’s the overall texture. Years ago, a college student was experimenting with an early Bitcoin wallet, combining imported keys with mnemonic seed phrases in a way that is no longer common. After that, there were ten years of forgetting, half-attempts, and running btcrecover against the wallet file while it wasted millions of guesses. At one point, he reportedly attempted about 3.5 trillion passwords. Nothing was effective. This gradual excavation of a younger version of yourself that left no helpful notes has an almost archaeological quality.
The breakthrough was piecemeal. He discovered an old mnemonic phrase scribbled in a college notebook a few weeks prior to the recovery—the kind of detail that seems like a scene from a movie but most likely wasn’t. The wallet file he had been staring at for years matched the HD addresses produced by that phrase. At last, confirmation that the correct wallet was on his hard drive. However, the password was still missing, and the file itself was still encrypted.
Two years ago, what he did out of frustration would have seemed ridiculous. He asked the AI to solve the problem by dumping everything from his old college computer into Claude. This is where the story’s viral version becomes a little deceptive. Bitcoin was not cracked by Claude. Encryption was not broken by it. It was quieter and possibly more beneficial. It found an older wallet after sorting through the digital clutter, orphan folders, and deeply nested backups that no one had touched since Obama’s second term.December 2019 dat file. He couldn’t even recall making a backup.
The older file existed before the password was changed. Additionally, Claude discovered a minor flaw in the way that btcrecover was receiving the shared key and configuration—a detail that a human examining the same data for the hundredth time might miss. The wallet opened when those parts clicked together.
This place has something worthwhile to sit with. The idea that you are solely in charge of your keys, seed phrase, and future has been promoted by the cryptocurrency industry for years. For the most part, that is accurate. However, the picture is complicated by the story of cprkrn. It implies that the wreckage of lost drives, dead phones, forgotten passwords, and abandoned wallets—which, according to some estimates, make up a sizable portion of all Bitcoin in existence—might not be as permanent as everyone thought. AI-assisted forensics is not a miracle. It can’t make keys appear out of thin air. However, it can be patient in ways that people just aren’t.
Depending on who you ask, that may or may not be good news. Researchers studying security will be concerned. Those who have held them for a long time will search their attics. Presumably, Anthropic won’t be mentioned in the more awkward discussions about what else Claude might be asked to unlock.
One man received his coins back for the time being. He claims to be naming his unborn child Dario Amodei. Most likely, he’s joking. Most likely.
