Graham Fraser Campbell (22 July 1936 – 30 January 2022) was an Australian rules footballer who played 151 games for the Fitzroy Football Club in the Victorian Football League from 1956 until 1964. Pl
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 0x8fc787a6cf889bd700b285bbd3c36bdc336408fd13dadac681f179ee8e23a7a5. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da05aba9-4e1a-49d9-b2f1-3842358c413f.json and https://artists.proofprofile.net/proofs/artist/da05aba9-4e1a-49d9-b2f1-3842358c413f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).