Recovery required a systematic search through the 2,048-word BIP39 list for each of

Survives

Case description

A Bitcoin holder discovered in October 2023 that a metal seed storage plate they had purchased and stamped in 2021 had a transcription error: one word had been stamped as a valid BIP39 word but not the correct word for that position in their seed. The error was discovered only when attempting to restore to a new device after the original device failed. Recovery required a systematic search through the 2,048-word BIP39 list for each of the 24 positions—a feasible but time-consuming process. The correct seed was found after testing approximately 1,700 word substitutions.

Custody context

Stress condition	Seed phrase unavailable
Custody system	Hardware wallet (single key)
Outcome	Survives
Documentation	Unknown
Year observed	2023
Country	International

Structural dependencies observed

Technical specialist required

Outcome interpretation

Access remained possible under the reported conditions.

Source

Privately Reported

Evidence type

News article

Evidence link

https://btcnewsanalysis.com/2022/08/16/how-a-trezor-wallet-passphrase-taking-a-lifetime-to-brute-force-was-cracked-by-keychainx/

Related cases involving seed phrase unavailable

146 cases involve seed phrase unavailable 274 cases involve hardware wallet (single key) View archive statistics →

This archive documents observed custody survivability failures. It does not attempt to document all Bitcoin losses or security incidents. Submit a case

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Framework references

Where Bitcoin Custody Intersects Legal and Fiduciary Authority

Where custody creates gaps in estate planning, fiduciary duty, and professional responsibility.

Professional Scope Boundary Matrix

What each professional or product covers, what they do not, and where gaps form between them.

The Independent Assessment Layer in Bitcoin Custody

How independent diagnostic layers emerge when multiple parties depend on shared infrastructure.