Coates in one of her key roles, the Countess in The Queen of Spades|thumb|alt=White woman in elaborate 18th-century costume, made up as a daunting old woman Edith Mary Coates OBE (31 May 1905 – 7 Janu
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375f5bf9dff07421f0f202976a0cc1e8a31ff8bafa82cca27eb6c4c061e0d158. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84430696-c9be-406e-aecd-82a692c4b2dc.json and https://artists.proofprofile.net/proofs/artist/84430696-c9be-406e-aecd-82a692c4b2dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).