right|thumb|Martyn Green in 1960 William Martin Green (22 April 1899 – 8 February 1975), known by his stage name, Martyn Green, was an English actor and singer. He is remembered for his performances a
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 0xf2949e9bb62df2e4e3d789416ae262394cc23ba6f0c75f421ac57ac520671bc3. Chain 2 (Bitcoin): anchored in block 953976 (2026-06-16T16:55:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2aedcc7e-933e-4100-a7bc-179ae7e7bc82.json and https://artists.proofprofile.net/proofs/artist/2aedcc7e-933e-4100-a7bc-179ae7e7bc82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sullivan: Gondoliers (The) (D'Oyly Carte) (1950)