Contracts and NDAs
Prove that a specific version of a contract, term sheet or NDA existed before negotiation, signature, or dispute. The EU-qualified eIDAS timestamp (T1) is admissible as evidence in civil proceedings across the European Union.
When you need a proof of existence
ExistBefore does not replace a notary, a court, or a patent office. It adds an objective cryptographic layer — verifiable by anyone, without trusting us — to documents and content where when matters as much as what.
Three concrete scenarios where users rely on it:
Insurance claims
Photographs and appraisals timestamped before a loss event let you prove the prior state of property, vehicles, or persons. Useful for property insurance, motor liability, and professional indemnity claims.
Theses and academic research
Establish priority on a thesis draft, an experimental result, or a dataset before publication. Complementary to DOI, ORCID, and preprint servers.
What they share
- The content never leaves your device. The browser computes SHA-256 locally. Only the hash transits.
- No account, no signup. Open the page, attest, download the PDF.
- Verifiable by anyone. An expert, a judge, or the opposing party can repeat the verification with standard tools — without trusting us.
- Three progressive proof layers. T0 (instant ECDSA signature), T1 (qualified eIDAS timestamp, ~1 hour), T2 (Bitcoin anchor for decade-scale validity).