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 0x36826562d3081a90cfee8a442091ec4c4ebbf13f1106748c119285955d839d99. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edcfa70e-ff7d-4af8-a47e-a94b7bcbffeb.json and https://artists.proofprofile.net/proofs/artist/edcfa70e-ff7d-4af8-a47e-a94b7bcbffeb.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 0xeb99d9508ab51cfb04eb00e505a084fe4bad585d5c0b8d8efa2f3deaf9d2173f. 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/QMBZ91301169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1230d60173be28b1aca074558ce37be30a646a4c293b17fc7b188137e926800c. 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/QMBZ91301177.
José Tejedor con el Conjunto Musicuba (Remasterizado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698202541dac3f17fe5d24cf755b1b80f2cf00a2afd81572d88c28531c74f820. 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/QM6N21877300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17852494eca1ae89d5a5281f8fc37c9e78a0864765fa81a223e7162940f6f45d. 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/ESA011302863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb8189697a6b0235453c8a78a908c7b5125bbda411e586bbe94c6edf96d4638. 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/ESA011302865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d205aa0d5423bf7572bdf21c60acefb7cecc8ad85f07fe1d782705d8141cbd. 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/ESA011302866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f36d5b1ac92351708ca03ead5e812e9d0eb72017294b52113147082b9b2085c. 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/ESA011302871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1958bde19622a1aa2d6bade498f14654cdaabcb31d54df00c23d98d54c9c64dd. 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/ESA011302872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71c2d732c922611e483f3f49fcd5a7fee16f46114ff1355899528904a0cb011. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:18:29Z), 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/USV351445393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6f71f969f1a2f2132b16b6de6b97e3a120a0105d8f9617339baadfd1fb6e41. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:41:28Z), 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/USV351445398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bb81038788fec9516b00c14e5b1cef149e440f1364b60831689e853409c9ce. 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/USV351445399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3871e8439344517c7e5d93a5bf91d2d724a845743f55da64aa04fa56923c29c6. 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/ESA031430256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c4f8c97ad50a9800e8d6e9cc1317e72db8be9f7574cf036880cad5e5d59c9c. 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/USJ3V1328321.
Afro Cuban Roots Presents Cuban Feelings: The Bolero Era
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3a0a61e383260e66d5bf1980568341013cf54d135a9c9c403c894df7894bf9. 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/US6R21353444.
La edad de Oro de la Música Cubana, Vol. 2 (Remastered)
México y Cuba: Una Historia de Música y Amor, Vol.2
Afro Cuban Roots Vol. 6 - Havana After Hours
Cuba Canta Vol. 2 Música Tradicional Cubana (Remastered)
Cuba Canta Vol. 1 Música Tradicional Cubana (Remastered)