James Blades OBE (9 September 190119 May 1999) was an English percussionist. He was one of the most distinguished percussionists in Western music, with a long and varied career. His book Percussion I
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 0x979ba433f78cc1fd238df3468feeb694d25409c74a820b59bf299771b3336d6c. Chain 2 (Bitcoin): anchored in block 954046 (2026-06-17T04:53:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41956a22-352e-47c4-a0c7-710a31ba73b5.json and https://artists.proofprofile.net/proofs/artist/41956a22-352e-47c4-a0c7-710a31ba73b5.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.