Leo Graham was a Jamaican singer. He first sang with The Bleechers, then after leaving the group recorded several solo singles in the 1970sChuck Foster Roots Rock Reggae: The Oral History of Reggae
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 0x8b263b4507277af77af0b02650710f3f6d188aba7b2b417864999cbdaf302606. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e21333cf-4888-4d4c-9b18-cf7a2be297b9.json and https://artists.proofprofile.net/proofs/artist/e21333cf-4888-4d4c-9b18-cf7a2be297b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).