Digital plagiarism is silent — and hard to prove
You share an illustration on Instagram. A few weeks later, you discover your design used by a brand — with no credit or payment. Without proof of an earlier date, it's impossible to demonstrate you're the original author. A file's metadata is easily falsified, a screenshot won't hold up in court. Copyright exists automatically, but you still need to prove anteriority in case of dispute.
A certified fingerprint of your creation, before any sharing
I finish a demo, an illustration or a creation.
I generate a timestamped proof before sharing it. The SHA-256 fingerprint is computed locally and timestamped by a third-party authority (FreeTSA) using the RFC 3161 standard.
I can show this version already existed at this exact date, with a readable PDF certificate and a verifiable cryptographic token.
The file never leaves my device. Only the digital fingerprint is transmitted. Proof Pack (ZIP) verifiable by anyone.
Accepted formats: PNG, JPG, SVG, PSD, AI, MP3, WAV, MP4, PDF — all creative formats
3 steps, 30 seconds
- Drop your creative file: Mockup, illustration, track, demo, video… drag and drop into your browser.
- Automatic local certification: Only the SHA-256 fingerprint is transmitted to the timestamp authority (FreeTSA, RFC 3161).
- Download your Proof Pack: Readable PDF certificate + RFC 3161 token. Then share your creation with peace of mind.
Why not just email the file to yourself?
ProofStamper vs other protection methods
| Criterion | Email to yourself | Soleau envelope (INPI) | ProofStamper |
|---|---|---|---|
| Cost | Free | €15 | Free |
| Delay | Instant | Postal mail (days) | 30 seconds |
| Confidentiality | File on email servers | Physical envelope | File never uploaded |
| Accepted formats | Limited attachments | Paper / CD | All (PNG, MP3, PSD…) |
| Online verification | No | No | Yes, free and instant |
| Technical recognition | No standard | INPI (France only) | RFC 3161 (international standard) |
All your creative files, protected in one click
- Illustrations & designs — PNG, SVG, PSD, AI, Figma exports…
- Music & podcasts — MP3, WAV, FLAC, stems, masters…
- Videos & animations — MP4, MOV, After Effects, exports…
- Photos & retouching — RAW, JPG, TIFF, Lightroom exports…
- Texts & screenplays — PDF, DOCX, scripts, manuscripts…
- Prototypes & UI mockups — Figma exports, Sketch, XD, wireframes…
Frequently asked questions
- Does ProofStamper replace legal deposit?
- No. ProofStamper provides a technical proof of anteriority (RFC 3161 timestamp), not a legal deposit. It's a useful complement: fast, free and verifiable. For high-value works, combine it with a deposit at INPI or a collective management organization.
- Are my files stored on your servers?
- No. The file stays entirely on your device. Only the cryptographic fingerprint (SHA-256) — a string of characters that cannot be used to reconstruct your work — is sent to the timestamp authority.
- Is this proof recognized in case of dispute?
- RFC 3161 timestamping is a widely recognized technical standard. It constitutes solid evidence to demonstrate the anteriority of a file. However, it is not a qualified electronic signature under eIDAS. For high-stakes disputes, consult a legal professional.
- Can I timestamp multiple versions of the same work?
- Yes. You can certify each version of your creation — draft, mockup, final version. Each proof is independent and proves the existence of that specific version at its timestamp date.