thumb|Agnes Waterhouse was accused of bewitching to death William Fynne and was hanged at Chelmsford in England on 29 July 1566 Agnes Waterhouse (c. 1503 – 29 July 1566), also known as Mother Waterho
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 0xe21137ff922b4a5c366d2fc2142578ff1fead853895f1437f4d58cc08ff43a91. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6796e12b-2a15-4e90-88e7-7d095963fef0.json and https://artists.proofprofile.net/proofs/artist/6796e12b-2a15-4e90-88e7-7d095963fef0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).