UTXO Ledger Audit & Rebuild
A full review of your offline UTXO list against known addresses, with a rebuilt paper or air-gapped ledger you keep.
DetailsSecure Data
Keep every cold-storage UTXO accounted for — on paper, away from the network.
We maintain offline address and UTXO ledgers for Bitcoin-only holders who refuse to leave their balances to memory or a single spreadsheet.
What you can request
Secure Data is a hands-on ledger practice in Yeouido. We do not hold keys, move coins, or connect your devices. We structure, verify, and keep the offline record that sits beside your cold storage.
Ledger work we take on
Each engagement ends with a physical or air-gapped record you can store with your existing custody setup.
Address Registry Maintenance
Ongoing care for your receive-address register — labeling, retirement, and inheritance-ready indexes without touching keys.
Details
Reconciliation Sessions
Periodic matching of your offline ledger against device-visible UTXOs after spends, receives, or long gaps.
Details“They rebuilt my address register from three notebooks and a damaged printout. The session took longer than I hoped, but every change was written in ink before we left the table.”
— Min-jun K., self-custody holder, Mapo
Sessions stay offline by design
We work from printed worksheets, signed checklists, and air-gapped verification when you bring a device. No cloud sync of your UTXO list. No remote screen share of seed material — ever.
Walk the process
Field notes
Practical writing for holders who track UTXOs without relying on a phone wallet history.
Ready to straighten your offline ledger?
Tell us how many addresses you track and whether the record is paper, metal, or a mix. We reply within two business days.
Request a session