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 0x0921d58cddd09cad283c01ffa62d4a2e7f5d16f615c77ec581e635c39eb8eb89. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89ce5df8-ed1a-4e6f-afe0-4b90a238faaf.json and https://artists.proofprofile.net/proofs/artist/89ce5df8-ed1a-4e6f-afe0-4b90a238faaf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for 3 Trumpets, 2 Oboes, Timpani, Strings and Continuo in D: 1. Intrada
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 0x7a20951bcf3057e62b0439dbcfc3c19cc5bf96560098759fcfafa25463162615. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA508643001.
Concerto for 3 Trumpets, 2 Oboes, Timpani, Strings and Continuo in D: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066fbe2e2588eaf3b5fd6970c21157191b4ae9d6f5c9b7c494c2c0da8d4d4081. 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/NLA508643003.
Concerto for 3 Trumpets, 2 Oboes, Timpani, Strings and Continuo in D: 4. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9466dae53ab76f4fe77619bf397bf0dcb3d9d9cfab1dbe8c2a8a4b58eda046. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA508643004.
Concerto for 3 Trumpets, 2 Oboes, Timpani, Strings and Continuo in D: 5. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adce4dc5b1e8e66ab4a6691c40ee5ede4b66912367eb2e2ff468633ceb9a7f7. 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/NLA508643005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aa00f6d845ed70847dc760b3d8199e130c53c36b4380221bf925866b5c4de8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLA508643006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a14be3567614b8b97f54c2b727abbe52fcef3954c6e80616731efbd3b21ea0. 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/NLA508643007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000c9ee8d3283c123414aeb5fa1f4485734ba98486122b68eecbfbdeaebc4d9d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLA508643008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5517cf8a5ec804c62e79aff8c0a28cbe4a0df68e881776dfd30940cf6a53e1d2. 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/NLA508643009.
Concerto for 2 Trumpets, Strings and Continuo in E flat: 1. Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a8809ac048a8961bae6e1dabe0a2c15932551ebe32c8d087aa003c9118c969. 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/NLA508643010.
Concerto for 2 Trumpets, Strings and Continuo in E flat: 3. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334e13bcd748ca6d818f365374d0820c555cb84e43bb0c4364409d64aeab798b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLA508643012.
Concerto for 2 Trumpets, Strings and Continuo in E flat: 4. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2494c9a928a1004480fc37860db6eeab0372e9fa7b28eabf28dd6f895fa69f98. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLA508643013.
Concerto No. 2 for Trumpet, 2 Oboes, Strings and Continuo in D: 1. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eb1aae19475e05cf052b88c656101ce8e1861da8afa5fef059a37182c93e94. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLA508643014.
Concerto No. 1 for Trumpet, 2 Oboes, Strings and Continuo in D: 1. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f6219993c700c15afd170ebf4a0791e371519eed08d7410e8a0e5f527fb89e. 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/NLA508643018.
Concerto No. 1 for Trumpet, 2 Oboes, Strings and Continuo in D: 2. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b48a1ad36b919f0f51fe9626157febf6a3413f356bb6ab2596c98f68246042b. 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/NLA508643019.
Concerto No. 1 for Trumpet, 2 Oboes, Strings and Continuo in D: 5. (Vivace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7476ba26dc892e146fd873eb0fc128203f3a75f711a72612f64dbb79ef0b8a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLA508643022.
Concerto No. 2 for Trumpet, 2 Oboes, Strings and Continuo in D: 3. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674acdfa7f0524a85feccdc0545613dec7a68f23baac44208601ea129c956a4e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:41:00Z), 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/NLA508643016.
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
Concerto No. 2 for Trumpet, 2 Oboes, Strings and Continuo in D: 2. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab46e94885ddeec02ffc1bc6da02c0813a94f6c3e6753fdb2fd2dab43f48523f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLA508643015.
Concerto No. 2 for Trumpet, 2 Oboes, Strings and Continuo in D: 4. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab71ddb3a3562a230e157033f97de3fafdc8ecfc54533b1795360767fd55f83. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLA508643017.
Concerto No. 1 For Trumpet, 2 Oboes, Strings And Continuo In D, TWV 53:D2: 3. Aria (Poco andante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf0fd62555532bff4e02a265028c61083b91b098c30793745fe55f3c3336ebc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLA508643020.
Concerto No. 1 for Trumpet, 2 Oboes, Strings and Continuo in D: 4. (Grave)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad9930b5c23a9bcc2fe06db11978a1d175e73db070c3171b77b8ea779fd0bdd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLA508643021.
Concerto in D Minor for 2 Oboes, Strings & Continuo, RV 535 - Ed. Hogwood: 2. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1950f4cc9b1460316df8628d6000444f573267ea9e425e73b0dde399d2f4665. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF077610492.
Bach, JS: Brandenburg Concerto No. 1 in F Major, BWV 1046: III. Allegro
The History of Classical Music: The Best of the Baroque Period
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1340dbd0f11302e0f1fcdbd43770ca0170a8c937c1d58811f513c0e61f8cd184. 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/GBAYC8500650.
Herz und Mund und Tat und Leben, BWV. 147: X. Jesu, Joy of Man's Desiring
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff153910f2542a6d8b766092d6f33317b0dcdcb965a7d1f9587ba11f1fc0f76. 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/GBAYC8300191.
Bach, JS: Brandenburg Concerto No. 1 in F Major, BWV 1046: I. —
Bach: Brandenburg Concertos - Orchestral Suites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddea1beb115e27b18cd73dfe38b2c6fa983728af79681cdb7012e91177f4bd85. 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/GBAYC8500648.
Bach, JS: Brandenburg Concerto No. 2 in F Major, BWV 1047: I. —
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39396176f0905c1958616524db46862350df01691efe56ff63402c62045d44df. 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/GBAYC8500653.
Bach, JS: Brandenburg Concerto No. 1 in F Major, BWV 1046: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdece687cb02e5d3042630341946249d25ad7585d23a9a58c9cfde05e83d4c057. 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/GBAYC8500649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1950f4cc9b1460316df8628d6000444f573267ea9e425e73b0dde399d2f4665. 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/GBF077610492.
Bach: Magnificat - Vivaldi: Gloria - Handel: Water Music - Mozart: Toy Symphony & Laudate Dominum - Boccherini: Minuet - Rimsky-Korsakov: Flight of the Bumblebee & Other Classical Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39396176f0905c1958616524db46862350df01691efe56ff63402c62045d44df. 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/GBAYC8500653.
Concerto in D Minor for 2 Oboes, Strings & Continuo, RV 535 - Ed. Hogwood: 3. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fde0c3a28e9b2cc5ed13870ab98184e6730f5c4e161aa25b0a4685bc2f8482e. 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/GBF077610493.
Concerto in F Major for 2 Oboes, Bassoon, 2 Horns & Violin, RV 574: 2. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e494d9d0b0016965bbe239c4380e9ed0a3cfeb3fa72bd09dde7046cefc7c3c. 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/GBF077610512.
Concerto in F Major for 2 Oboes, 2 Horns & Violin, RV 569: 2. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e42f160a571a6396fa77eb06306da7cd7d04e6467786d5112a18504f422eef3. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBF077510522.
Concerto in D Minor for 2 Oboes, Strings & Continuo, RV 535 - Ed. Hogwood: 1. Largo - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee649d668ddb351da17bf8ffe67204c47fd003f6d4aaeadb26a5eb2cb94bcd4e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBF077610491.