Verify any work. Instantly.

Every registered work has an IPFN — a public, permanent record of authorship. Paste one below, or an IPFS CID, or a SHA-256.

Or type an IPFN into any browser bar — LENS-92.3pfn.xyz resolves straight to its record.

See the 60-second live demo →

An IPFN resolves anywhere a link does

The International Pinned File Number (IPFN)

A public record of authorship built for the internet.

Create.Certify.Connect.

Certify Your Work

Upload your digital work to receive an IPFN certificate, establishing immutable proof of authorship and timestamp.

Check Authenticity

Verify the authenticity and authorship of digital content by searching our decentralized registry.

Verify

What is IPFN?

The International Pinned File Number (IPFN) is a decentralized registry that creates an immutable record of digital authorship. By combining IPFS content addressing with SHA-256 fingerprinting, we provide cryptographic proof of when you created something and that you are the original author.

IPFN certificates are permanent, verifiable, and cannot be altered or removed. They serve as a trusted source of provenance for creators, publishers, and anyone who needs to verify the authenticity of digital content.

How It Works

1. Upload Your Work

Submit your digital file to our platform. We support documents, images, audio, video, and more.

2. Generate Certificate

We compute a SHA-256 fingerprint of your exact file and pin a signed registry record to IPFS, issuing a unique IPFN certificate with timestamp.

3. Share & Verify

Your IPFN certificate is public and permanent. Anyone can verify it against our registry — by IPFN, content hash, or IPFS CID.