alt=Saffron|thumb|Saffron crocus, Crocus sativus, with its vivid crimson stigmas and styles Saffron ( , Persian: زعفران) is a spice derived from the flower of Crocus sativus, commonly known as the "
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d79bac9d0db68e274e73749542823196ed2fd6e4f69000f545d6faaf50fbf2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2235116-0b6e-4b98-9d9c-a85ed16eb8d2.json and https://artists.proofprofile.net/proofs/artist/f2235116-0b6e-4b98-9d9c-a85ed16eb8d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).