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 0x682713fc0c3f1677adc9990d6260ed11ec610e395b6c1162cf527040bab49fd5. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4403c5d-52a3-4761-b3e2-f81c0db2db79.json and https://artists.proofprofile.net/proofs/artist/a4403c5d-52a3-4761-b3e2-f81c0db2db79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Choral Fantasy in C Minor for Piano, Chorus and Orchestra, Op. 80: II. Finale: c. Marcia, assai vivace - Allegro - Live at Schauspielhaus, Berlin, 1991
"Allegro" - Berlin Philharmoniker plays Bach, Beethoven & Mozart
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 0xe79c70bbc65c79de95914647793edefa6714679f017cb6db0c09b8fc4d1fae06. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/DEF059102594.
Choral Fantasy in C Minor for Piano, Chorus and Orchestra, Op. 80: II. Finale: b. Adagio ma non troppo - Live at Schauspielhaus, Berlin, 1991
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68d9337fcce848d988c686dac08694f21531db9639080b7bf67203f5030719c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEF059102593.
Choral Fantasy in C Minor for Piano, Chorus and Orchestra, Op. 80: I. Adagio - Live at Schauspielhaus, Berlin, 1991
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23f51030d81b45b8cf5c089a67cd4edbcdf641783f0ffa2c95087a80781b6bf. 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/DEF059102591.
Beatrice di Tenda, Act I: No. 1. Introduczione "Ah! Non pensar che pieno" (Agnese, Filippo, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2243f444df4dc23896ce7ce8de3d51312177ab278d85e78ae74d2fc49bf0b77. 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/NLY331305842.
Beatrice di Tenda, Act I: No. 2. Recitativo e Duetto "Silenzio è Notte intorno" (Agnese, Orombello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ebb92be79b20614642af919c989b7b5fcefb08f837c543ac8ae4d8f54da9e1. 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/NLY331305845.
Beatrice di Tenda, Act I: No. 2. Recitativo e Duetto "Sì. rivale" (Agnese, Orombello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec57097d394d838c898d7771214667df300383dfa5f3fb07788d0b81ab83ca0b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NLY331305846.
Beatrice di Tenda, Act I: No. 2. Recitativo e Duetto "E la mia" (Agnese, Orombello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba963f5f87ecf3831daa6e1bc628cd4c59cd6b5c20d47893a7e96e27b5d3949d. 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/NLY331305847.
Beatrice di Tenda, Act II: No. 12. Finale secondo "Oh! Arresta" - "Angiol di pace..." (Agnese, Orombello, Beatrice)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7402c6fcf9cb9d6af6a80bc581022aab0d8e55521e627dda79adb6c816e0600. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLY331305888.