280px|thumb|Brownlee, 2018 Lawrence Brownlee (born November 24, 1972) is an American operatic tenor particularly associated with the bel canto repertoire. Describing his voice, Speight Jenkins, genera
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 0x02c5f7c6f08c6e3663856abd3584735657a837aeca51d9cc0554708a1af7c017. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17076cd5-1a05-4462-9908-ac143d134f3b.json and https://artists.proofprofile.net/proofs/artist/17076cd5-1a05-4462-9908-ac143d134f3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il barbiere di Siviglia: Act 1: Piano, pianissimo (Fiorello, Chorus, Almaviva) - Live
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x58642d062e6a85f852110ad3cd999521577c45d22a99c90cdb41c7606b51bbab. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZR6R2100511.
Il barbiere di Siviglia: Act 1: Ecco ridente in cielo (Almaviva) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b0a2a80939df8e865b6aafd6f2c8a868943464b9c6acec502f92e0d29ac38e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZR6R2100512.
Il barbiere di Siviglia: Act 1: Ehi, Fiorello! (Almaviva, Fiorello) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5129c384852e4b28405e0b7e739fdbc4a0501c1fe21a8b0caeb5f5d1c6b98679. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZR6R2100513.
Il barbiere di Siviglia: Act 1: Mille grazie...mio Signore (Chorus, Almaviva, Fiorello) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509bc285f40d427d7a4df08cb95ad91a12defa3b616c1ad64639dc6d9b1e6af5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZR6R2100514.
Il barbiere di Siviglia: Act 1: All'idea di quel metallo (Figaro, Almaviva) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecb81e632a73ea9de7c4bac5b3b7d9640cf9dea297e6807431872d6cfa0d59e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZR6R2100521.
Rossini: Messa di Gloria: IV. Gloria in excelsis Deo
Orchestra dell'Accademia Nazionale di Santa Cecilia
Coro dell'Accademia Nazionale Di Santa Cecilia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b57d02c05f58637018f4738823d9889656687fffb4886d35e957551592c24aa. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202110.