SHA-256 proofs anchored to the Kronos Latch — a physics-grade temporal witness that no blockchain has. Not approximate. Not self-reported. Proven.
Every proof is anchored to a live temporal witness from the Kronos BlockTrain — not just a timestamp, but a physics-locked moment.
Every proof carries an LHash from the Kronos Latch — millisecond-precision drift calculated from pulsar timing and continued fractions. Unfakeable.
Proofs are positioned in a continuous weave, each linked to its predecessor. Move one, and the entire chain breaks. Tamper detection is structural.
Every proof generates a sharable PDF certificate with QR code, weave position, Kronos ID, and verification link. Court-ready documentation.
Simple API: POST a SHA-256 hash, get a proof. Idempotency keys, rate limiting, structured JSON responses. Production-grade from day one.
Anyone can verify a proof with just the hash — no account required. Full transparency without exposing the original document.
Optional permanent storage on Arweave — milestone proofs that survive even if our servers don't. Pay once, prove forever.
Drop your file in our app or compute the SHA-256 yourself. Your file never leaves your device.
Your hash is positioned in the weave and anchored to the latest Latch snapshot from the BlockTrain.
Receive a Kronos ID, PDF certificate, and permanent verification URL. Share it anywhere.
Anyone can check a proof by entering the hash. No account needed. Public, permanent, provable.
Start free. Upgrade when you need more proofs. No hidden fees.
| Feature | Kronos Proof | OriginStamp | DigiStamp | OpenTimestamps |
|---|---|---|---|---|
| Physics-anchored time proof | ✓ Latch | ✗ | ✗ | ✗ |
| Instant confirmation | ✓ <1s | ~24h (BTC block) | ✓ minutes | ~1h (BTC block) |
| PDF certificate | ✓ | ✓ | ✓ | ✗ |
| REST API | ✓ | ✓ | ✗ | ✗ |
| Free tier | ✓ 50/month | ✓ 3/day | ✗ | ✓ unlimited |
| Weave integrity chain | ✓ | ✗ | ✗ | ✓ (Merkle tree) |
| Non-replayable temporal witness | ✓ Convergent braid | ✗ | ✗ | ✗ |
| Price (500 proofs/mo) | £5.99 | ~$10 | ~$50 | Free |
50 proofs per month. Free. No credit card required.
Open Kronos Proof