Sanyu may refer to: __NOTOC__ Places Sanyu, Chipwi, Burma Sanyu Township, Gansu, China People Sanyu (painter) (1901–1966), Chinese-French painter Cinderella Sanyu (born 1985), Ugandan musician Jemima
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 0x51c69386231400456aff17d569a2d05326f62a37621441e15541cbe2f3d5fd68. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1122da84-4ec9-4c96-9cd5-4f6c49761076.json and https://artists.proofprofile.net/proofs/artist/1122da84-4ec9-4c96-9cd5-4f6c49761076.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).