verification • certificates • reference images
authentic.cosigo.io
certificate verification & reference records
Use certificate reference numbers to open published records, review reference images, and access the verification tools used for physical coin documentation.
This portal is intentionally separate from the store frontend. The store points here for verification records and measurement documentation.
Example: 815560 → /certs/cert_815560_815561.html
density verifier
Water displacement + dimensions → density → material check.
certificate gallery
Scans and published certificate pages with reference numbers.
coin archive
Reference photos by type, year, and certificate-linked image sets.
measurement method
How displacement testing works, what it means, and how to avoid common errors.
all tools
Calculator tools, record helpers, and future verification utilities.
about authenticity
What authentic.cosigo.io records, what it does not claim, and why transparency matters.