Annual Custody Review
Once a year, reconcile what changed — new devices, moved backups, skipped verifications — and update your written custody record.
Learn moreGumi, South Korea · Est. 2019
Your altcoin reserves deserve a written custody history
Utilityhemlock helps long-term holders document every offline wallet transfer, storage relocation, and verification checkpoint — so your custody timeline survives decades, not just market cycles.
What we document
Custody events that matter over twenty years
Cold storage moves
Hardware wallet rotations, seed phrase re-engraving, and geographic relocations of offline devices — each dated and cross-referenced in your master ledger.
Verification checkpoints
Scheduled balance confirmations, passphrase drills, and recovery rehearsals recorded with witness notes for family or estate planners.
Succession binders
Structured handover packets for heirs who may never have touched a private key — written in plain language, separate from seed material.
Custody records
Services for reserve holders
Cold Storage Planning Session
Plan where devices live, how backups rotate, and what your future custody ledger should capture — before gaps appear in your timeline.
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Custody Timeline Documentation
Flagship service: we interview you, review your records, and produce a bound custody timeline ledger for long-term altcoin reserves held offline.
Learn moreFrom our clients
Holders who chose documentation
After moving my Ledger from Seoul to Gumi, I realised I had no single document explaining when each wallet was created. Utilityhemlock built a custody binder I can hand to my brother without exposing seeds.
The quarterly review session caught a gap in my paper backup dates. Not dramatic, but exactly the kind of detail that would have confused my estate lawyer.
Available on the Microsoft Store
Get it from MicrosoftWhy written timelines
Exchange records vanish. Apps update. Hardware fails. A custody timeline written on archival paper and stored beside your cold-storage plan gives heirs and advisors a map — not a guess.
About UtilityhemlockField notes
Recent articles on offline custody
Why a custody timeline outlasts your wallet apps
Apps version out. Binders stay. Here is what to log each year if you hold altcoins offline.
Read
Paper backups vs metal plates in your custody ledger
Metal and paper backups age differently. Your timeline should say which is which, and when each was last inspected.
Read