Sir James Paul McCartney (born 18 June 1942) is an English musician. He gained global fame with the Beatles, for whom he was the bassist and keyboardist, and shared primary songwriting and lead vocal
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 0xc4cd01e800f878266dad719f034788b76a115b19ecda08b7e0737fd857e60aab. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cad47201-4d69-4bf4-b873-fb7cc41d970f.json and https://artists.proofprofile.net/proofs/artist/cad47201-4d69-4bf4-b873-fb7cc41d970f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.