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 0x22c1ad4c99887b8bf4305838ba0272ea3157ac0d1ecea701d8dfd78e1b5f222f. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/856c1117-b92d-400c-86a9-84fa091d580f.json and https://artists.proofprofile.net/proofs/artist/856c1117-b92d-400c-86a9-84fa091d580f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oboe Concerto in C Major, K. 314: I. Allegro aperto
Mozart: Oboe Concerto K. 314 - J. Haydn: Sinfonia concertante, Hob. I:105
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42322f4e9cf25f4582ade08afe1184f1c06266ac23700328120376b2341291d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH1261430201.
Oboe Concerto in C Major, K. 314: II. Adagio non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1da6176ca707a081e60dc9ba94e7dae1af2e97af11b8ad258ad9723ff7f1a3a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH1261430202.
Oboe Concerto in C Major, K. 314: III. Rondo. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc046f6dd31f72fda0829a8c7b3e189492fd0ce0ff718d430caa2e133175660. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH1261430203.
Sinfonia Concertante in B-Flat Major, Hob. I.105: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1066ab6fbf8f2b7c7667f861bbea1e7399df0ce809775b12088f209e02810f3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH1261430204.
Sinfonia Concertante in B-Flat Major, Hob. I.105: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd34b31d7cb94523c934eaf7b90d2ae5ee02f84ca65b8eb77b62d1dfc1d5028. 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/CH1261430205.
Brandenburg Concerto No. 1 in F Major, BWV 1046: I. (Allegro) - Live from Teatro Romolo Valli, Reggio Emilia, 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7753a1c051e0c1a7bf70a36c8a6af891a64f63490b5bc475f7e5e6c513595b4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEN960702011.
Brandenburg Concerto No. 1 in F Major, BWV 1046: II. Adagio - Live from Teatro Romolo Valli, Reggio Emilia, 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae27f01638f1cd89e5da97419e4d61ed7b817b8b54016fa59dfd28d66dfe9796. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN960702012.
Brandenburg Concerto No. 1 in F Major, BWV 1046: III. Allegro - Live from Teatro Romolo Valli, Reggio Emilia, 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc6463702e750f63e1bd1030a8efd9354986dcb5e8015c713d250fd857af9a8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN960702013.
Brandenburg Concerto No. 1 in F Major, BWV 1046: IV. Menuett - Trio - Polonaise - Menuett - Trio - Live from Teatro Romolo Valli, Reggio Emilia, 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b405c4c6dcaa776df4073f4e244b5cd443f3afa4a718f40b5567c2c4c11f6b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEN960702014.
Sinfonia Concertante in B-Flat Major, Hob. I. 105: III. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8a36300bfe2bf57a34a0b56286cc88d378ab0edfadd02cd9a076594a97dfc6. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CH1261430206.
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