John Sawyer may refer to: John G. Sawyer (1825–1898), U.S. Representative from New York John Edward Sawyer (1917–1995), academic and philanthropic administrator John Sawyer (writer) (1919–1994), Brit
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 0x0807085e21a76754d56e9173c30169c17579e724f3416083cd1a0c7fd353404f. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a10dca8a-ffe0-4baf-bbfd-2754be2b7f5a.json and https://artists.proofprofile.net/proofs/artist/a10dca8a-ffe0-4baf-bbfd-2754be2b7f5a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
John Sawyer Performs A Tribute To James Taylor
Modern Art of Music: A Tribute to Garth Brooks
Music & Highlights: A Tribute to Garth Brooks