IPFN — the Internet Publishing Protocol
Instant Verification.
Look up a creative work’s registered authorship claim, file fingerprint and available anchor receipts. One public record, shareable by link or QR.
Checks the public record · IPFN · IPFS CID · SHA-256 · No account required
Create. Certify. Connect.
Open the verification walkthrough ›Verifies anywhere a link does
What is an IPFN?
A public, verifiable address for creative work.
An International Pinned File Number identifies a registered claim about a work. The record exposes the claimant, available file fingerprint and completed pin or ledger receipts. It does not independently establish copyright ownership or the truth of the claim.
Built for artists and authors — provenance for the new internet.
Books too — the ISBN names the edition, the IPFN certifies the work
FileChain
Daily volumes. Public anchor receipts.
Eligible registrations are grouped into dated volumes. A completed volume records a hash and its Base transaction. Compare the stored bytes and previous-anchor links to check the chain. Registration, pinning and confirmed anchoring are separate steps.
No production volumes anchored yet — the first appears here the moment it confirms on Base.
The registered manifest’s content address. Availability depends on providers retaining and serving its pinned bytes.
A fingerprint of exact bytes. Changing pixels, metadata or encoding changes the digest; a display copy may differ from the original.
The public chain the daily commitment is written to — where any later edit becomes detectable.
Registered manifests use IPFS content addresses; availability depends on maintained pins. C2PA compatibility: preserve the original. Original-byte preservation is distinct from validating a credential. Edited or compressed exports are separate, unsigned derivatives; IPFN does not currently validate or issue C2PA credentials. Blinding Visuals Press is a member of the Content Authenticity Initiative (CAI).
Official registration authorities
Interested in serving as a registration authority for another medium? Indicate your interest ›
Create. Certify. Connect.
Create
Make the work. Photographs, books, prints — anything with an author deserves a record.
Certify
Register your claim and get a checkable record. Pinning and ledger anchoring have their own visible status; a number alone is not an anchor receipt.
Connect
Share the record’s link or QR alongside the work. Readers can inspect the claimant, fingerprint and any completed ledger anchor.