Mark Ronald Holden (born 27 April 1954) is an Australian singer, actor, TV personality, record producer, songwriter, and barrister. He was a pop star in the 1970s and had four top 20 hit singles, "Nev
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 0x0e78945fa94931b5213cd915dd2927fc249f1a04931e8e84c3433530deede9ed. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84450614-1510-4c48-bb5a-3b651f499457.json and https://artists.proofprofile.net/proofs/artist/84450614-1510-4c48-bb5a-3b651f499457.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).