Jeannette Sinclair (11 April 1928 – 11 April 2024) was an English soprano. She sang a variety of roles as a principal soprano at the Royal Opera House, Covent Garden and at Glyndebourne Festival Opera
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cb2b9fe40e321933346d15622b1ad4c2c69f6520a7ae97d4709e7ee20ea3de. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3f83266-cfde-4c93-b14c-db1b8ac0d028.json and https://artists.proofprofile.net/proofs/artist/c3f83266-cfde-4c93-b14c-db1b8ac0d028.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).