Keith Jarrett (born May 8, 1945) is an American pianist and composer. Jarrett started his career with Art Blakey and later moved on to play with Charles Lloyd and Miles Davis. Since the early 1970s, h
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 0x642bbfc8c2b5887aa79ec8efca5feadd0ed66ebd64483cfe52531efe089f0366. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/629c5dc6-6e38-4041-aab8-0f040babaa1a.json and https://artists.proofprofile.net/proofs/artist/629c5dc6-6e38-4041-aab8-0f040babaa1a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.