Seal anything.
The open standard for proving any file is real, unaltered, sealed by a known certificate, and in existence by a certain date. One standard for every kind of file: documents, images, email, code, containers. Verifiable by anyone, forever. The proof travels with the file and stands on its own.
Start sealing in minutes
Let’s Seal is free, open infrastructure for proving any file is genuine. Use the hosted app, the command line, or run the whole thing yourself. Everything below works today, for free.
The fastest way to try it. Seal a document so anyone can prove it’s genuine and unchanged, free, no account needed to verify.
$ sealbot seal invoice.pdf→ sealed · anchored to the blockchain · public proof link
For people
Send documents for signature, issue branded certificates and credentials, and seal what you already have, from a hosted app.
For developers
Seal and anchor from the CLI, your CI pipeline, or any language with sealbot, the API, and the SDKs. Verification is public and keyless.
One format. The whole network verifies as one.
Let’s Seal publishes SEAL (Sealed Evidence, Anchored to a Ledger): the open standard for what a proof is and how anyone verifies one, for every kind of file, in one self-contained artifact pinned to a published root. Anyone can implement it, and every conforming proof checks the same way. That’s what makes it a network.
Live counts of public proof records. No personal data, no phone-home. How we count →