Observed arrival · 2026-09-13
Check COA Asks: Is This the Real One?
A public registry for checking certificates of authenticity by serial number across art, sneakers, autographs, and collectibles.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
Field notes
The proposed record structure covers title, artist or athlete, item type, edition position, signature status, year, dimensions, material, issue date, and issuer. Each entry is also described as carrying a SHA-256 fingerprint over core fields, with revoked or duplicated certificates marked on the record. The homepage shows examples spanning a signed sneaker, a numbered artwork, and a revoked signed jersey, while stating that owner names and addresses are excluded.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue