Donald Richard Spencer (born 22 March 1937) is an Australian singer-songwriter, musician, and former children's television presenter, he also hosted his own teenage television and radio music variety
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 0xc33755317e7733c1876077a38de7d877bdf60c988dcd3b529ddabeb133d95559. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a95f2c1-720a-4d7c-a7a6-d8d21bed3c7d.json and https://artists.proofprofile.net/proofs/artist/2a95f2c1-720a-4d7c-a7a6-d8d21bed3c7d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.