Guy Adam Pratt (born 3 January 1962) is an English bassist. He has worked with artists including Pink Floyd, Roxy Music, Gary Moore, Madonna, Peter Cetera, Michael Jackson, the Smiths, Robert Palmer,
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 0x7bcec216e67ea997ec41b0e1921de6d148e4615bca68686a79675ecdb26df03f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a1899dc-bf34-4ddb-b54a-e8dcfeea41ad.json and https://artists.proofprofile.net/proofs/artist/5a1899dc-bf34-4ddb-b54a-e8dcfeea41ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).