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 0x3f1175f94f0e67e89a82a5da874fe9b808441b9b95eb32f78c3d1103fcbb9508. 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/db61c157-d095-49ea-b2f9-6b70302568c7.json and https://artists.proofprofile.net/proofs/artist/db61c157-d095-49ea-b2f9-6b70302568c7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Orfeón Donostiarra en Su Centenario (Vol. II)
Viejas Canciones Donostiarras y Folklore Vasco
Mozart: La Flauta Mágica, Weber: El Cazador Furtivo - Grandes Coros de Ópera
Il Trovatore, "Coro de zingaros": Il Trovatore, "Coro de zingaros"
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 0x86704cbb575a3e97fb763b6ae55232531d3ff361aae1b2d769e451cd59f4ac5d. 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/ES5300715330.
Aida, "Gloria all'egitto": Aida, "Gloria all'egitto"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887b6817bde205d2ff13ee77fbf0256cee721e5498328da8b84594552c7721e9. 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/ES5300715331.
El Principe Igor, "Danza Polovtsiana, No. 17": El Principe Igor, "Danza Polovtsiana, No. 17"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66174aa4a5f7de401fe37d9ad1f4915e5787f7a15b7398c9b0305d82f5d2bfb4. 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/ES5300715333.
Nabucco, "Va pensiero": Nabucco, "Va pensiero"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646473027f446c76fd24709737aa00d0b161943e05b638faf20497be07904cea. 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/ES5300715334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86753d85173fd453c63f9f88db335288edcb231b38e3cdea81aff4009bca0c05. 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/ES71G2323915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c76ec36ad136a883c245962e1c542a7a13ee69c3ffdf041be26d9e36a465b83. 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/ES71G2323919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe937566ee58caed0d97c599c2c62deb028dfad9d5c4f035360c0a3b81c82cdd0. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ES71G2323916.
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 0x91dbafb4fb1906ec699ae468261a2c09b89ed57fb8d1bb179df72a1529dbedda. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES71G2323918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7e92456f3a851578629855297a942dde1a32da519393290af6080728a2b5c7. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ES71G2323927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae241442c682398ab678f768cc0da48a02b0ac78e2233138d7f3a3dd3dd99f55. 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/ES71G2247868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf042125f6e3e0a284e05c4dce8cdf09ec83cbe3fa2e8f5ca764532ca180d8b08. 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/ES71G2247870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897636d32ea0e9230065e1ebe78e0fb67efde9dd29579be739f5a600a68039ce. 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/ES71G2247871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0ffca8d1ae6ff118824fd7e71b1a97fbab413f20c5bd9b55757c15279b5e97. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES71G2247867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5e21c4fbe8be052744abb4939438f825849478a8196c71a77cfa22f3c9ecac. 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/ES71G2247873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e970f43a8b1d7e1be9d45fdd1fe02bfc160fbbe0925fa1cabc6910a13545e9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES71G2247872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9b9e7e753d2038724cc59d956b4c40d62aec3aa7c998f66e8212be6050c3b0. 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/ES71G2247874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27052de6190f198fe9f92c2ef2a4a0c901296045be7bc18740cd4934bfa5f5. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ES71G2247878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d975ea5f45e43885c3e7c228d1114c6e6e2190ca69473a6700fd1950ba87b1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ES71G2247877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c532624de36b8491a5e8f6d21e85f38b9724c2f2180880657b3bb2e6fc20bfd. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ES71G2247880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf607d42f33eecb01676d356612159836a2ce656507537419f6c646c2754b1652. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES71G2247882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83734d690b482ca728b784075813c136240f14b8ee940422fb9387960193d47. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ES71G2247884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd547f8b745196cae87caf01b8bf491df5c67df61f3984f6a0dc53da84fec12a3. 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/GBAYC0102328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9c557745e8914f25c96cc128ddd855aeee8298caa3184cf3c67d5bbcd832fd. 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/GBAYC0102329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6429f1f2d2defa5fe794945f76b7b92ce02c0257c15902fcb56bba1fc21c33a0. 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/GBAYC0102346.
Verdi: Messa da Requiem: I. Requiem æternam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b6111263d74395c4e197b402bab31ccdfe58a0c61d11e4ec4cfb887ab3d346. 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/GBAYC0102325.
Verdi: Messa da Requiem: XXI. Libera me, Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52d62dfdabade2099549e952065a5d6edf42f87fbb085292d61e3e1813eb343. 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/GBAYC0102348.
Verdi: Messa da Requiem: II. Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a359829d693840f4d56dff793c8837068f1a9f3c71d85d0509d1a15a8466ff. 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/GBAYC0102326.
Verdi: Messa da Requiem: VI. Liber scriptus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e81d41b09f33e3892928e82befdefe0a165024a175085a7d3449b0b2a4b20a3. 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/GBAYC0102331.
Verdi: Messa da Requiem: VIII. Rex tremendæ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457eddf5c9598903def585fb366dda65176ce2ac4be46419d60c3a36ba820f50. 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/GBAYC0102333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8297d140aca8ed7d5f44dd659a14fdf86558504001e3728c6442e0c43d939fdb. 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/GBAYC0102337.
Verdi: Messa da Requiem: XX. Requiem æternam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c881205e1d77b4183024b6500c1447045aa257c9c7e1cfbb87cf156c23c98d8. 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/GBAYC0102347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d3938521774ba8dda5860be5677b54974ebae6577c11bec2974339bd8d5e71. 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/GBAYC0102336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd132c4e7920e77eac7fa9f7d5504bf60b71f0301e05dd2391f502c78c7b39655. 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/GBAYC0102341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cf9b4a20b801e8ea6cdd236671ffb4c044aa288d61d12d3099b9340d144f01. 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/GBAYC0102342.
Verdi: Messa da Requiem: XVIII. Libera me, Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aa431be75286903ee36bec327230b9a757db44ef24fa5b3f204b2d2f8d78ba. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:06:48Z), 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/GBAYC0102345.