Leo Paul Doyle (1923-2015) was an Australian rugby league footballer who played in the 1940s. Career Wollongong born, Doyle was a gifted young footballer in the Illawarra Competition in the early 194
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb95c0c8ff090eae7abfa097e604bb2e5913445d8d7f0792266f781bddb8211d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1513ea7-2ca1-4907-8fe9-5381de322b95.json and https://artists.proofprofile.net/proofs/artist/a1513ea7-2ca1-4907-8fe9-5381de322b95.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).