How it works: Verified Ownership
Last reviewed 26 Sep 2026
Not available yet. Starts after an independent security audit.
What you get
An Owner Certificate for one unique item (GTIN and serial number), in your own wallet.
The technology
An ERC-721 token on Arbitrum One. Issued at least 14 days after registration. On the network: only the certificate, GTIN, serial number and wallet address.
Where the certificate is kept
In your own wallet, e.g. Coinbase Smart Wallet. Neither DPP Host nor the brand can move, lock or delete it.
Handing it over
Send it to the buyer's wallet. If the item is lost or stolen, lock it; unlocking takes 7 days.
Batches
A batch can be marked stolen with a police reference. Passports never say a single item is stolen.
What the daily timestamp covers
Daily OpenTimestamps (Bitcoin) proof that a passport version has not changed. It does not cover ownership.
What it does not prove
A certificate shows which wallet holds it, not who has the item. It is not legal proof of ownership: national law decides that, and no EU rule recognises these certificates. A lock is the holder's own statement, not a police register.
Privacy
Wallet addresses are public and permanent. Use a new address per valuable item. Your e-mail and linked wallet stay off the network.
If DPP Host closes
Certificates keep working with any wallet, without DPP Host.