Custody Logs

Professional tamper-evident documentation services for paper and steel offline wallet backups in Cheongju and Chungcheongbuk-do.

We offer three custody services for holders who keep seed phrases on physical media. Each engagement produces handwritten, dated records with photographic evidence of seal states.

Choose a service below for scope, duration, and pricing basis. All visits are conducted in person unless you require a remote consultation about log structure only—which we offer solely for clients who have already completed an initial audit.

Custody Logs

Recurring visit · ₩95,000 per quarter · 4-quarter minimum

Quarterly Log Refresh

Scheduled return visits to add dated entries, replace worn tamper-evident tape, and update environmental readings for ongoing custody documentation.

Full description
Custody Logs

Short visit · ₩150,000 per session

Seal Verification Session

A focused 45-minute visit to witness intact seals, update your existing custody log, and apply fresh tamper-evident tape when legitimate access has occurred.

Full description
Custody Logs

On-site visit · From ₩380,000 · quote for additional containers

Tamper-Evident Backup Audit Log

A full on-site documentation session producing a bound custody logbook with seal photographs, environmental notes, and chain-of-custody entries for every paper or steel backup container.

Full description