Isn't a deposit on HAL or arXiv enough?

HAL and arXiv are open publication archives. They come after the final draft and involve publication. ProofStamper lets you timestamp from the very first version, before any sharing, in complete confidentiality.

Is my thesis sent to your servers?

No, never. All processing happens locally in your browser. Only the cryptographic fingerprint (SHA-256) — a unique identifier that cannot reconstruct your document — is transmitted to obtain the timestamp.

Can I timestamp multiple successive versions of my work?

Yes. Each version generates a unique fingerprint. You can timestamp as many versions as you want to document the evolution of your work.

Is this proof recognized in an academic dispute?

The RFC 3161 certificate is a recognized technical proof of priority. Combined with a bailiff's report, it constitutes solid evidence to establish the date of existence of a work.

Timestamp a thesis or research paper — Proof of priority

Academic plagiarism, discovery priority: the risks are real

A PhD student shares ongoing work with their lab or at a conference, only to discover months later that another researcher publishes similar results claiming priority. A student submits an original thesis but is accused of plagiarism on a section written well before the alleged source — without proof of date, it's impossible to defend yourself. The official submission date on a university platform often comes too late in the process.

Certified proof of priority, from the very first version

I'm finalizing a version of my thesis, paper or dataset.

I generate a timestamped proof before sharing with my supervisor or peers.

I can prove that this exact version existed at this date, before any official submission.

The file never leaves my device. Only the SHA-256 fingerprint is transmitted.

Accepted formats: PDF, Word, LaTeX, CSV, JSON, dataset ZIP — all academic formats

3 steps, 30 seconds

Drop your file: Thesis, paper, dataset, formalized hypothesis… drag and drop in the browser.
Automatic local certification: SHA-256 hash computed in the browser + RFC 3161 timestamp via FreeTSA.
Download your Proof Pack: Readable PDF certificate + independently verifiable .tsr token.

Better than emailing your supervisor, faster than institutional deposit

Three approaches, only one combines speed, confidentiality and independent proof.

Criterion	Email to supervisor	HAL / arXiv deposit	ProofStamper
Delay	Instant	Days to weeks	30 seconds
Confidentiality	Low (email)	Open publication	100% local
Accepted formats	All	Mainly PDF	All
Third-party verifiable	No	Yes (after publication)	Yes (RFC 3161)
Usable before submission	Yes (no proof)	No	Yes ✓
Free	Yes	Yes	Yes

At every stage of your research, proof is possible

Master's thesis — Date each version before review by your supervisor.
PhD dissertation — Timestamp your chapters as you write.
Scientific paper — Prove priority before submitting to a journal.
Original dataset — Certify a dataset before sharing or publication.
Hypothesis or protocol — Freeze a formalized hypothesis before experimentation.
Simulation code — Timestamp the code used to produce your results.

Frequently asked questions

Isn't a deposit on HAL or arXiv enough?: HAL and arXiv are open publication archives. They come after the final draft and involve publication. ProofStamper lets you timestamp from the very first version, before any sharing, in complete confidentiality.
Is my thesis sent to your servers?: No, never. All processing happens locally in your browser. Only the cryptographic fingerprint (SHA-256) — a unique identifier that cannot reconstruct your document — is transmitted to obtain the timestamp.
Can I timestamp multiple successive versions of my work?: Yes. Each version generates a unique fingerprint. You can timestamp as many versions as you want to document the evolution of your work.
Is this proof recognized in an academic dispute?: The RFC 3161 certificate is a recognized technical proof of priority. Combined with a bailiff's report, it constitutes solid evidence to establish the date of existence of a work.