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 0x9b73c4d55d37676ddd2662bbce5b2ad568aa61da70b02b3be5335fff5b0d553c. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f586ebf5-53ef-4ab8-b3f9-72a16a526457.json and https://artists.proofprofile.net/proofs/artist/f586ebf5-53ef-4ab8-b3f9-72a16a526457.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cantemus Domino + Ps. 82. Antífona. Modo V - In Secundo Nocturno
Oficio De La Toma de Granada. Fray Hernando De Talavera, osh (+ 1507). Oficio De Maitines
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 0x812d4942ae9218c2cff7380b7feb8bf56b24cc7b7358edb6170a81955b2804f0. 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/ES7731008012.
Cantemus Domino. Responsorio. Modo II - In Secundo Nocturno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d449a4fe41733a878f4f2e6a23447362c1db090d2e2aa9708402371353e0961. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES7731008015.
Congregati Sunt. Responsorio. Modo I - In Secundo Nocturno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e50b4e6f12312c8b31a9d54b5d93338e093566037f616c0b5f0edab56c9380e. 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/ES7731008016.
Domine, Labia Mea Aperies / Deus In Adjutorium Meum Intende - Invocaciones Iniciales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b62298fd24cc0505417e7a4a0b03425d94a026c015a6e06c1d7b5a879884f12. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES7731008001.
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
Beatus Rex Fernandus + Ps. 111 Antífona. Modo I - In Primo Nocturno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c673c65c71c0442fd13133b996aed415144f4787b14fbde0e7e136bff15111e. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES7731008004.
Quoniam Rex Et Regina + Ps. 20 Antífona. Modo III - In Primo Nocturno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bd30331e0a7c001926c988babae9e240206be897c44907d0c4ba2b53fe54c0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES7731008006.
Laudemus Deum Nostrum + Ps. 93. Antífona. Modo VI - In Secundo Nocturno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c9631317fdeacdb0d94a2a3b6566c1f0f406defbde4ee9a60f9493afbd1375. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ES7731008013.