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 0xdf565aa67c2cfd854f72e152f614eda19c73fa54e63eb5c1bc68d6e0ed1aa5fe. 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/2fe31cd2-808d-4aa7-a0a5-8b4079191bd1.json and https://artists.proofprofile.net/proofs/artist/2fe31cd2-808d-4aa7-a0a5-8b4079191bd1.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 0xb9499e933a8149856a15d20f17686a85e8f9330655f266cc8bcf2204e767ad00. 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/DEE790412720.
The Real Cuban Music - 100 Essential Greatest Hits (Remasterizado)
Love For Latin Rhythms: 100 Famous Classics And New Hits (Including Balada, Ai Se Eu Te Pego, Bachata, Salsa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fc3e7789987895d816c1ab248ad719b7e9c893bc2b493871dd0659acbdd687. 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/ESA031429029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a301d5f5f751f3620452f031a136278b01bb26af4a7cf4c68221983913a122. 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/QMBZ91578615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62fd26e3c98e82fa6c23762a205a4d24c913e455f522af15c74e7b97a65aff. 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/QMBZ91578625.
Añejo Carta de Oro: 100 Joyas de la Música Tradicional Cubana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1803bf1796585e744e8ea90216a72687d3377f93c3bbc6dd9603f8ef6b401c67. 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/ES5300714008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb080f9d11b81679de13f64a4cf1a023985da7912a43b3513b357687ff9a72a. 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/ES5300714010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b9c784d1190ec959788d22fd1942bcb6792677a3cad26ccd29458771c8265e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES5300714012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23b53d78e1712d6ec8437bfad74881b232aeba84bcbf413af7a25bc9b169a22. 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/ES5300714006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492faece1e3273cc289f5360c781c485aa04d29bf3ded08f19f2a92c44c49ea2. 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/ES5300714007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c5c0b0bd8d5686bf3ed76fd4f7a001c1250e523ed88cd1f60f28348c2da807. 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/FR6V80705300.
The Real Cuban Music: Son (Remasterizado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff59348a7a6720db54e108f0755f4f8a83550d942022158ae7180e88065a5f8. 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/ES5021600191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf71282384e8b606c29d9b79e497e2928979d1db4be867a1d99eb46510925e3d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:45Z), 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/ES5021600200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1796ee41aa3d171b58e49f9e73c12ac0341a008fb63d42732db2120e49d755ca. 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/CUA020215453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ed67dd3e38ba1853414a760590407c1966f16ca38e9f570ef2de3d7bfa067a. 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/CUA020215456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174b5345857ed3459ffe312e13a57f1036e35ced4bba0626e33bdead3c39aa6d. 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/CUA020215458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b69c578b8a4a4c601d5259fc0c7c212dd5152d76d30995273ac673a1c1075e. 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/US6QR1700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5de0ff9495caa67a423515d4402b207dc48b8318b26f78bf17843bfc05f144f. 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/US6QR1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0343a337b483ac084cad67bc7d1ccb440b4757f161b8b5e7adadf59d3346911e. 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/US6QR1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ab75567f8461ffed8323c7577ea457981f974dfa1b1cda3977f9b6ada55439. 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/US6QR1700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c39c71d619fee2e6696711f19135223be5a33c642ae45d209469fe79b5f65a6. 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/US6QR1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400b04ed0acbdae8ec97cd27fe8ed8611a09341fdb13cdf179464b8ee9a36890. 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/US6QR1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc938d0d160c01f97c414f1c88c51aefee071a980c506a4ad9195661fd85e171. 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/US6QR1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cfd5f7bd4eac65ee0064c6fc5a91792a4f2a982c892da92c96db88e06b840d. 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/USCGJ0527330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49466c94dae96fa2acf1d6da106216c42337c9bef7f7f0e056bfe36e6237de18. 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/CUA021511090.
Septeto Nacional De Ignacio Pineiro's Alma Guajira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb3a01e22849547927ef647cb289a61b6c5f16dc1effd4dd12279490832f540. 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/ES71G2039260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fecfb9674f9b48ee0cb376fa8f67c37007533e2a769a6c745ccba28a924757. 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/ES71G2039264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060867ad2918be395cfa40bd245efc348abec91f25e8251b10313fc921170d58. 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/ESAAI0156562.
Septeto Nacional Ignacio Piñeiro Canta Carlos Embales (Remasterizado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106e4d9a6eb8a963679fd7f8d2180fc9821e8b8f6b3b81fdbc261526a54ed784. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:58Z), 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/ES5021600884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e63c18e69f22c2fbf820cb62cf173f256d4ab617dc7481d6e2dbcebbf314968. 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/US78T0502764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b872edebc4782dd12a60e9036540a6f6812d2d1900a34b99de7ac59e3129ef6. 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/US78T0502758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aad34f7accba2ecf9a55f316ea3ce753e9f9e2969b0b6f0674c7d53cdb97f4. 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/US78T0502762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1fc77a64a0b076c680fe939ea92981abf3ea9fe86f2c407a6c9ad582b8778c. 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/USDBB0990748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be63440e3545ce2860fb00c4a38ef4991328e283027cbb246736fc4a1ea7a8b. 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/USDBB0990752.
7 Days in Havana: Original Motion Picture Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfa3546d926f3dc0269636b38e4cd97a8ffa7ae9720658e897c914cb3fb17be. 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/GB2H71200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767e7b9209c75a5fb0d5aa874fd125bc1fcaf742dbf8145d887e49ec1d137ad9. 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/GB2H71200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e7683bc9f9921fae14a3a0e2c138af8c975338a5daafa98194ba466edc337f. 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/USDBB0990946.
Serrat Encanta: Cuba Le Canta a Serrat Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492faece1e3273cc289f5360c781c485aa04d29bf3ded08f19f2a92c44c49ea2. 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/ES5300714007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4614f0af666e5dc059b2305ecd80634e05868a5533efff4944b9ec46a7fa9c8f. 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/CUA021306956.