The Diamonds are a Canadian vocal quartet that rose to prominence in the 1950s and early 1960s with 16 Billboard hit records. The original members were Dave Somerville (lead), Ted Kowalski (tenor), Ph
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 0x9f9d0f6e0d40ff4c5dd9cb3f07d78901903a0f2ce089804c51cdbe510717d9fa. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea2e9730-5b26-4243-91ae-465cc0d8775c.json and https://artists.proofprofile.net/proofs/artist/ea2e9730-5b26-4243-91ae-465cc0d8775c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.