Martin Speake (born 1958) is a British saxophonist. He teaches at the Royal Academy of Music and at the Guildhall School of Music and Drama. He previously taught at Trinity Laban Conservatoire of Mus
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 0xe5b6d1fc234b969074c8ca893083d71aa3d6cd8f2d6f2e710168e8df73798fa6. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2caab3d9-18db-440a-9782-6983548d799a.json and https://artists.proofprofile.net/proofs/artist/2caab3d9-18db-440a-9782-6983548d799a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.