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 0x34b7fce768c21c27f5d69920ac00bb9b6599dbb27f20fefc6de0262e5e843d86. 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/ab5e01aa-efc8-43d3-9d6a-ba0fe83b249f.json and https://artists.proofprofile.net/proofs/artist/ab5e01aa-efc8-43d3-9d6a-ba0fe83b249f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dictionary of Medieval & Renaissance Instruments
Dame, ne regardes pas (Medieval Fiddles)
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 0x9941a5cffd48401a03a5183902f825c35f8e74edd34887d3a1f250993dbeba41. 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/MX2831000690.
Ave Eva: Chansons de femmes des XIIe et XIIIe siècles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdb02c62053fb8a0ed2ed96ec4bbb65846716231c1db6ab5a8610f3245333de. 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/MX2831000296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892321eb1187d3f853dffd6ea44167b65c6cb2e84d1de677514e95fc6a0ad138. 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/MX2831000765.
Les escholiers de Paris (Motets, chansons et estampies)
De Champagne: Le chansonnier du roi (Amour courtois et chevalerie au XIIIe siècle)
Exsultate jubilate: Dix siècles de musique sacrée
Splendeurs de l'Ars nova - Plain-chant et polyphonies du 14e siècle
Richard Cœur de Lion, troubadours et trouvères
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7304fdfa9f9f11c3f946bd16b4b4c0e4453fa735fe8fd76627c475a73bca15. 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/FR10S1758044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5a13df05d337588a56587d012ffb806d98cfaf2c2a502201dd6d66d353a6f4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR10S1758051.
Nova Sonet Harmonia: Huitième centenaire des dominicains
Santa Maria: Chants à la Vierge dans l'Espagne du XIIIe siècle
Un chemin d’étoiles (Chansons des pèlerins de Saint-Jacques du Moyen Âge à nos jours)
Music for a King - The Winchester Troper
Universi Populi: Chants sacrés à Prague du XIIème au XVème siècle
Hortus Deliciarum (Chants Grégoriens Du XIIe S.)
Enixa Est Puerpera: Hymne - Hymnaire de Pairis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52016ad07e1586c3f6b64761832e5aebc09969f37116de6e74a15e972d583777. 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/FRX299806100.
Sol Oritur Occasus Nescius: Conduit - Hortus deliciarum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1238d857d53db1390fc0cb49c43619b1f2c8f22ba83e94efbeade1ebdad6a1. 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/FRX299806110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacc246062e36070e9213465ca542fe4244d2b59b1fa8b3e26eb6df78fea8b9a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX299806120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54978c4eadf4e956dd081bc57d65e77d952ba2e7bb858abc5edd7bca41d4926c. 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/FRX299806130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8205ea907942205195748f40ee2c9b90a3ecc0894689b4759a5c63163c7dff. 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/FRX299806140.
Leto Leta Concio: Canon - Manuscrit de Florence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec65eb9fa634b6e34a51091c4cf34c765dd9cdab14b68fde90fbf8d64a6e4625. 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/FRX299806150.
Congaudeat Turba Fidelium: Trope de Benedicamus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b500f61bc2d135bdd10c2e565f9233a0c0bc66dc2e59ea94b4b3a36be97fabb. 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/FRX299806160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3680f9250837d2eb2af73526405fa96c0effb68385030fe99b83050b2b0a101. 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/FRX299806170.
Dilexisti iustitiam: Graduel - Graduel de Paris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98014a00a3c317318700acdb9dc8270af2fc38f0e33d8987d963aa66554d3e90. 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/FRX299806180.
Veri Floris Sub Figura: Manuscrit de Saint-Gall
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cef5dd057fcea7dc96352400401a01a903a84eb80c6f0fed80318043446217. 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/FRX299806190.
Primus Parens Hominum: Hymne - Hortus deliciarum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60192b8b678d7ca4928240836493aea12122169ec316a543e4ef50c34d5c1515. 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/FRX299806200.
Offerentur Regi Virgines: Manuscrit de Saint-Gall
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4f414ab27b60b97030825393ce2595a8afd101720965da4b868d4580ae9088. 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/FRX299806210.
Sanctus - Phos, Patris Karitatis: Trope de Sanctus - Codex
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd13bf746bb2aa681bb3ae777ca62ec14bd1c183f3970b785d8c96ca558c6e1c. 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/FRX299806220.
Agnus Dei - Ave Maria: Trope d'Agnus Dei - Codex
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe167a4cb94b1ca528b4c0f2fccc6cb2ecf050d49d930c85dd907788c046b9224. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:06Z), 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/FRX299806230.
Iube Domine, Navigantes Inde Sursum, Beate Virgo: Sanctis Rome visitatis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fecbab5baee5df31bb9335ca1c397cd9875d339ead3d515f905fd946e43e60d. 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/FRX299806240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71003dfa5016491613e8705005600d13358acfcad17cc1bdf813fa50097da876. 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/FRX299806250.
Eya Pueri: Chant de Noël des XIIe et XIIIe siècles
Cantigas de Santa Maria: Nenbressete Madre de Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bf8d6b1f59918aa68a0c956050acc47780c59bce858f6f12fb0a414129e955. 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/FR10S1720674.
Cantigas de Santa Maria: Maravillosos e Piadosos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5673067b678c00f30b2c10eabb3d6faae6622a20e7c06d7b4ace18e6f697d74. 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/FR10S1720675.
Cantigas de Santa Maria: Null Ome Per Ren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434ff4ace6e8ef513aaadd659af66b20bc50054cfab870db2d1328b9d087fa27. 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/FR10S1720690.
Jerusalem: Gregorian Chant and Early Polyphony
Le roy engloys se faisoit appeller le roy de France
Canto gregoriano, les tons de la musique
Quem Quaeritis ? Drames lithurgiques au moyen âge