right|thumb|Martyn at the New Orleans Jazz & Heritage Festival Barry Martyn (born Barry Martyn Godfrey; 23 February 1941 – 17 July 2023) was an English jazz drummer, active principally on the New Orle
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 0x1c3b2a7c073a4f561b339c3cfa1de53cd18c549a673571e67c8f2d1e9eb58d1a. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39a52cff-304c-4a6e-86a2-8d4f43436077.json and https://artists.proofprofile.net/proofs/artist/39a52cff-304c-4a6e-86a2-8d4f43436077.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).