Joyce Castle (born Lillian Joyce Malicky, on January 17, 1939,Texas Birth Index, 1903–1997 in Beaumont, Texas) is an American mezzo-soprano who has had an active opera career for the last four decades
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 0x11705b0c2e13dfd7562d49c2e7560485e0bdb41691d4c0120aed5135ef2e6a93. 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/4f20bacf-123b-4d39-869c-07310bd3ef6a.json and https://artists.proofprofile.net/proofs/artist/4f20bacf-123b-4d39-869c-07310bd3ef6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).