Prove a piece of data existed at a given time — backed by several independent European institutions who'd all have to collude to forge it. No cost to the user, no blockchain, and verifiable forever, even if Zeitwerk itself disappears.
Timestamping in the spirit of OpenTimestamps, minus the Bitcoin anchor and minus the lose-your-receipt-lose-your-proof problem.
- Boring primitives only — SHA-256, Ed25519, JSON/CBOR.
- Written spec; any verifier can be re-implemented from it.
- Reads OpenTimestamps
.otsproofs — a strict upgrade, not a fork. - Exports RFC 3161 tokens for legal-adjacent consumers.
- Offline-verifiable, forever.
See also: https://digitalevidencetoolkit.org/tools/zeitwerk-timestamping/
Zeitwerk is funded by the Federal Ministry of Education and Research under grant number 16IS26S28, administered through the Prototype Fund.
