Seed Phrase Audit
We confirm your recovery phrase is legible, complete, and stored in a format that will survive years in a drawer or safe.
Learn moreDaegu · Since 2019
Your Cold Wallet Deserves a Yearly Witness
Portal Cedar Hub conducts in-person verification appointments for offline cryptocurrency wallets. We review seed phrase storage, hardware integrity, and custody records so your holdings remain recoverable when you need them.
Schedule Verification View Flagship Session
What We Verify
Annual Cold Wallet Review Sessions
Each appointment walks through your offline custody setup with a trained verifier. We document findings, flag risks, and leave you with a written summary you can file alongside your records.
Hardware Wallet Inspection
Physical examination of your device for tampering, firmware currency, and proper passphrase configuration.
Learn more
Yearly Cold Wallet Verification
Our flagship session combines all checks into one structured appointment with a signed verification report.
Learn moreClient Evidence
What Appointment Holders Say
I had not opened my Ledger since 2021. The verifier walked me through a test recovery on paper only — no devices connected to the internet — and caught a misspelled word on word seventeen.— Min-jun K., hardware wallet holder since 2019
The written summary was thorough. I wish the parking near Demo-ro was easier on weekday mornings, but the session itself was exactly what I needed before renewing my insurance rider.— Sarah L., multi-sig custodian
From the Journal
Field Notes on Offline Custody
12 Mar 2026
Why Thermal Paper Destroys Seed Phrase Backups
Receipt paper seems convenient for writing down a recovery phrase, but the chemistry that makes it print also makes it fade. Here is what we see in audits.
28 Jan 2026
Preparing for Your First Cold Wallet Verification
A practical checklist for clients arriving at their first yearly verification appointment at Portal Cedar Hub.
Offline Wallet Tracker
Available on the Microsoft Store
Our Office
Visit Us in Nam-gu
Portal Cedar Hub operates from a private consultation room in Daegu. Appointments are scheduled in advance — walk-ins cannot be accommodated due to the sensitive nature of wallet verification.
Office 9, 33 Demo-ro, Nam-gu, Daegu 00000
Contact UsBefore Your Appointment
Bring your hardware wallet, seed phrase backup (in sealed form if preferred), and any prior verification reports. We never ask you to enter seed words into a computer or phone during the session.