Proof You Were First — and always were. Turn your creative process into a verifiable timeline of authorship. Each version is timestamped and secured on Bitcoin — private by design, publicly verifiable.
Your file stays private—only a digital fingerprint is created in your browser.
Add it to your project timeline (draft, revision, or final release).
Versions are cryptographically chained to prove continuous authorship.
Each proof is timestamped and anchored to the blockchain via OpenTimestamps.
Download certificates, embed badges, or share your public timeline.
AI can mimic style, but not a credible history. A single timestamp is a snapshot; a timeline is a story — an irrefutable chain of evidence that it's always been you.
Optional identity signing is coming soon. Files remain private; we only store hashes.
ProofYouWereFirst.com combines OpenTimestamps anchors with hash-chained versions to create a creator-friendly system for continuous proof of authorship.