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 0x39da3397ceb7cbdb6feb59b854e244a21bffbf727eb84fcfd31242d16efa092a. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba4f5552-7831-48b9-b8e8-d106005a266b.json and https://artists.proofprofile.net/proofs/artist/ba4f5552-7831-48b9-b8e8-d106005a266b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bononcini: Stabat Mater / Lotti: Crucifixus / Caldara: Crucifixus
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 0x81a0610761b70bf7d25eb0b86cd12e0f1e05f41a6e50229f0a982e6f2f5fe6fc. 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/GBF077711560.
Stabat Mater - Ed. Smith: 4. Pro peccatis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7079efbb97e7723c86a0571348f6f3d6e74cec0ad033067ab57776c605da8655. 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/GBF077743404.
Stabat Mater - Ed. Smith: 6. Sancta Mater
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42356baa4c6532b207a14d7a1fad679bed4f5590b2db6d3bb056506b1715ef43. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBF077743406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5093287c8129a28e85291ae50a82c5375d0e5c50251cfe532b380570a5d3854d. 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/GBF077310491.
Patterson: Mass Of The Sea / Sinfonia For Strings
The King Shall Rejoice & Other Chapel Royal Anthems
Gloria, RV 589: I. Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b367cec3f0525ecebccbb860dfdf2c06e0fdcc9b5380ea60cef09f8a52f5f91. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBF076640001.
Magnificat (Formerly Attrib. Pergolesi): Magnificat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944c0765c4447bf355f2a28a079862914206e5faca4ce051ec989b6889084c71. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBF076610651.
Magnificat (Formerly Attrib. Pergolesi): Et misericordia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ca22736cb84df9e4ee42471496737606ed9fbc2066206e070156387d37584. 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/GBF076610652.
Magnificat (Formerly Attrib. Pergolesi): Deposuit Potentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fd6fe21c76b1e84f205fbd4f0ec64dec4c3d11c9ed527313e15927547c787c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBF076610653.
Magnificat (Formerly Attrib. Pergolesi): Suscepit Israel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366f16dce1deebb287494a083224e700ff7a677728a85efba176b36397b2606a. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GBF076610654.
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
Palestrina: Missa 'Sine Nomine'; Missa Ecce Ego Joannes
The Choir of the Carmelite Priory London
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac404153c987554bbb0f2e6ee2139f8f532949fcfcbf2296e7f9481839368ad5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:48:06Z), 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/GBF076311364.
Madrigals, Book 9: Non voglio amare, SV 172
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84f3fb79c49fa45b93de3a0c800d7cc1d1e1e69dec2619a0534a717cb192f8c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF057100590.
Verdi: La traviata, Act 2: "Di sprezzo degno sé stesso rende" (Germont , Alfredo, Barone, Others, Except Violetta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408a7a31e6a2f092fc7277e80450b31126bec8ccfd3887bd8a14fd61f1d94714. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBAYC8000113.
Verdi: La traviata, Act 2: "Di Madride noi siam mattadori" (Gastone, Matadors, All Others)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8d01fca60bef5accb1a3355508202d607cf3b6bdd2773315f3389e84fc4b88. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAYC8000109.
Verdi: La traviata, Act 2: "Ah, vive sol quel core" (Alfredo, Giuseppe, Commissionario, Germont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b27c3547c5f65ebca4b41bf0a761a91552ccb25a2b51f79cdb980e65d4db6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAYC8000102.
Verdi: La traviata, Act 2: "Alfredo, Alfredo, di questo core" (Violetta, All Others)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffdd4b9ea1a42eb316b0541618b3dc452771dfb4ef854ff16d8face8da3e913. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAYC8000114.