📦 COMING SOON
Seal the exact state of a codebase, document set, or design library on Base blockchain — one immutable proof for thousands of files.
We'll email you when this launches. No spam.
HOW IT WORKS
Choose a folder or drag in individual files. Everything stays in your browser — nothing is uploaded to our servers.
Each file is hashed with SHA-256. The hashes are combined into a Merkle tree, producing a single root hash that represents the entire project.
The Merkle root is sealed on Base blockchain via EAS. Anyone can verify any individual file — or the whole project — against this single on-chain proof.
USE CASES
Prove a release was published in a specific state. Protect yourself from false accusations of backdated code.
Establish prior art for patents and trade secrets. Create an immutable record of your invention before filing.
Timestamp datasets and analysis code before publication. Satisfy reproducibility requirements with cryptographic proof.
Seal contract bundles, due-diligence packs, or audit evidence at a known point in time for dispute resolution.
FAQ
No. All hashing happens in your browser using the Web Crypto API. Only the final Merkle root hash is sent to the blockchain — your files never leave your computer.
Yes. Because the proof uses a Merkle tree, you can generate a cryptographic inclusion proof for any individual file without revealing the rest of the project.
There is no limit on file count. You can seal a single document or an entire codebase with thousands of files. The on-chain footprint is always the same single Merkle root.
WHILE YOU WAIT
Attestum's professional reference verification is fully operational. Same technology, same trust infrastructure.
Or get notified when Project Snapshots launches
We'll email you when this launches. No spam.