On-Site Safe Verification Session
A lead verifier visits your premises, inspects sealed hardware wallets inside your safe, and produces a bound reserve verification log with offline balance snapshots.
Daegu & Nationwide · Est. 2019
Proof-of-Reserve Records for Wallets Locked in Safes
Content Birchfield visits your vault, verifies hardware wallet holdings offline, and delivers signed reserve verification logs you can file with counsel, trustees, or family offices.
Today's Ledger
What We Document On Site
Device Inventory
Serial numbers, firmware versions, and tamper seals recorded for each Ledger, Trezor, or Coldcard unit found inside your safe.
Reserve Snapshot
Offline balance checks performed without connecting devices to the internet. Results entered into your verification log with witness initials.
Custody Chain
Who held keys during the visit, safe access method, and photographic evidence of seal integrity—bound into a single dated folio.
Flagship Visit
On-Site Safe Verification Session
Our lead verifier travels to your premises with air-gapped laptops, Faraday pouches, and pre-printed log templates. A typical session covers up to four hardware wallets and two hours of safe access.
Deliverables include a bound reserve verification log, digital copies on encrypted USB, and a follow-up call to walk trustees through the entries.
Full Service Details
Supporting Visits
Related Verification Work
Quarterly Vault Audit Retainer
Scheduled return visits every quarter to re-verify seals, update reserve snapshots, and append new pages to your standing verification log.
Reserve Log Documentation Package
For holders who completed their own offline checks and need a verifier to witness, bind, and register entries in a formal reserve log.
Client Records
What Holders Say After Their Log Is Filed
Our family trust needed dated proof that the cold storage in the Gangnam safe had not moved since the last quarterly review. The verifier photographed each seal, ran the offline checks, and left us a log our solicitor accepted without further questions.— H.J. Park, estate trustee, Seoul
The session ran longer than quoted because one Trezor needed a firmware note in the margin. I appreciated the honesty on the invoice rather than a rushed checkbox exercise.— M. Choi, private holder, Busan
Field Notes
Recent Journal Entries
Reading a Reserve Verification Log Entry
How to interpret device inventory lines, seal notes, and witness blocks in a hardware wallet verification log.
Preparing Your Safe Before a Verification Visit
Practical steps to arrange access, gather devices, and brief witnesses ahead of an on-site hardware wallet audit.
Available on the Microsoft Store
Offline log companion for reserve records
Get it from Microsoft