Prove you created it first.
Upload any file and get a legal‑grade proof in under a minute. Anchored on public blockchains, accepted in EU courts. Start free — no credit card.
Drop a file or click to certify Any file type · Max 100 MB · Your file never leaves your deviceor
Create a free account
✓ Free to start
✓ File stays on your device
✓ Proof valid forever
60s
to certify
·
5
layers of proof
·
27
EU countries
·
∞
validity
How it works
1
Upload your file
A unique fingerprint is computed on your device. The file itself never leaves your computer.
2
We anchor the proof
Your fingerprint is signed, timestamped, and recorded on the Tezos blockchain. Immutable and public.
3
Share or store it
Get a PDF certificate and a verification link anyone can check — no account needed, no expiry.
What every proof includes
Digital fingerprintUnique hash of your file
Blockchain recordAnchored on Tezos — permanent
Certified timestampProof of when it existed
PDF certificateDownload and keep forever
Verification linkAnyone can check it — no account
Evidence PackStandalone ZIP — Pro plans
Who is it for?
📸
Photographers
Timestamp your shots before sharing.
🎨
Designers
Protect your concepts against copycats.
💻
Developers
Certify code and configs to prove authorship.
✍️
Writers
Prove you wrote it first.
🎵
Musicians
Protect beats and lyrics before release.
⚖️
Legal teams
Court‑admissible evidence packs.
Ready to protect your work?
5 free proofs per month. No credit card. Upgrade when you need more.