Who this is for
Households holding Bitcoin, Ethereum, or other assets on Ledger, Trezor, Coldcard, or similar hardware wallets who have not verified access in the past twelve months. Suitable for single-device setups and simple two-of-two arrangements.
What happens during the visit
We begin with an inventory of devices, firmware versions, and backup locations — without photographing seed phrases. You enter your passphrase in our presence while we observe the unlock sequence. We then guide a micro-transaction to a address you control, recording the transaction hash on our sign-off sheet.
The session closes with a binder update: device serial, last verified date, firmware level, backup location codes (not contents), and the next scheduled check date stamped in red.
Included
- Pre-visit preparation checklist sent by email
- 90-minute witnessed verification at our Mapo office or your Seoul address
- Updated custody binder pages (physical and PDF)
- Calendar reminder for your next quarterly date
Excluded
- Seed phrase recovery if words are lost or illegible
- Exchange account access or hot-wallet management
- Legal advice on tax, inheritance, or asset allocation
Provider
Conducted by a File Brook Line custody technician with a minimum of four years documenting cold-storage arrangements for private clients in Korea.
Next step
Request a verification date with your device model and the date you last confirmed access.