thumb|Vincenzo La Scola Vincenzo La Scola (26 January 1958 – 15 April 2011) was an Italian tenor who had a successful international opera career for more than 25 years.The Daily Telegraph (28 June 201
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 0x0500326b39f8d6f5aa8cbf72ebf25f56c76b2ed2d1af30832873cc57d5b7ecbb. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d2f9fa0-4d93-4f48-9945-dee852bb0af5.json and https://artists.proofprofile.net/proofs/artist/7d2f9fa0-4d93-4f48-9945-dee852bb0af5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Duparc, Bellini & Others: Vocal Works (Live)