John Alexander Brymer OBE (27 January 191516 September 2003) was an English clarinettist and saxophonist. The Times called him "the leading clarinettist of his generation, perhaps of the century".Goo
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 0x440622a77225ac47fe25903fdf9ccfca4f8140426970528056c785fefba51475. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3336176-e4c9-4465-8ff4-06bbb61e6ade.json and https://artists.proofprofile.net/proofs/artist/e3336176-e4c9-4465-8ff4-06bbb61e6ade.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.