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 0x150a9b30cd6873b36702c1682cbb7bd04681ff7a25913e0b75d27b4b222f1c93. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea05320f-88cc-41b5-ba1d-6cdc4705eb9f.json and https://artists.proofprofile.net/proofs/artist/ea05320f-88cc-41b5-ba1d-6cdc4705eb9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x94972c2e64462f4cd8c5d4908d465759dd4ed30f27684c74c5bb44654748ce2f. 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/US6R21300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b701b6b43876c500e369656c8f8a094a4b45f63c22cbe723db2cfe438c573e. 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/USV291352869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b297f3464fa555c12d1579092933fc81747e7138436ed61bf14f008b1ea828b. 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/USV291352870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f5e9c99b88b7cffdf3512b2c0306e261a66456d8b48b948e891182cab14b88. 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/USV291352873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13137da07c875f28450e9700ac6bd2388f2d6a662b6c900e7d2ea08640af8f53. 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/USV291352886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d104c2ee135ae3590c452368a961c7ae99920c75fffa46896c013cd5c0e0afd. 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/QMDA61432675.
La edad de Oro de la Música Cubana, Vol. 2 (Remastered)
Detlef's La Isla Bonita - Musica Cubana Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01237c74f98295009487ed80bdb244f7b825c875b44bf762f2266c6f8cab246c. 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/DEE790818400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc0b4ffedc1a1940d3bec4ab2754076e9194d63bf5fec6bb4157d819b30a621. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US6R21329174.
50 Hits de la Vieja Radio Cubana Vol. 11
Salsa Caribe 100 Rumbas, Merengues, Guarachas, Mambos...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a06ac2699b51a0bfac8a4890ade8f4ac2ebcc969e1d56d1825a68b1ca7404c7. 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/QMFME1497074.
The Real Cuban Music - Conjunto Rumbavana (Remasterizado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a97b3498c3617bf3c0341e356669b4239b6d8a39d36c222e48fa651e10e2e1d. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ES5021608714.
Cuban Memoirs - Cuban Classics VII: Marte Y Belona Dancing Academy
México y Cuba: Una Historia de Música y Amor, Vol.1