Deposit certificate and its statuses

A deposit certificate confirms the fact and time your material was placed on the platform and that it has been unchanged ever since. It is not a state copyright registration or a patent — it is proof that at the stated moment you already held this exact file.

How to verify a certificate

Every certificate has a public verification page addressed by its code (like IF-…). On it, anyone — without signing in — sees whether the cryptographic signature checks out, the content fingerprint (SHA-256), the blockchain record (if any), and the certificate status. Authenticity is verified independently of the platform — from the signature and the on-chain record, not on our word.

What the statuses mean

Valid

The certificate is current and confirms the fact of deposit. The content has not changed since issuance.

Superseded

A newer version of this certificate has been issued — usually after a transfer of rights to a new owner. The latest version is in force; earlier ones remain verifiable. The author's name is preserved in the new version — the rights holder changes. A link to the new version is shown on the verification page.

Revoked

The certificate was annulled by a platform operator with a stated reason and date. Revocation does not erase the document — it stays verifiable as revoked. The owner cannot revoke a certificate.

Object deleted

The owner (or an administrator at their request) deleted the object, so the PDF document is no longer issued. But the fact of deposit is not cancelled: verification by code keeps working, and the blockchain record, if any, remains forever. The certificate is still considered valid.

Certificate versions

The version grows on each re-issue: v1 — the original certificate, v2 — after a transfer of rights to a new owner, and so on. The latest version is the one in force; earlier ones remain available for cross-checking.