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 0x59c6f4c1fd90b2e13bf95762b65179acb5d41f05e4f3d06183c11167da5c1de2. 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/ea9cb3ff-3544-42b7-b672-429074c449d5.json and https://artists.proofprofile.net/proofs/artist/ea9cb3ff-3544-42b7-b672-429074c449d5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bdddef2249abe1a4819ed85e3a17748e0494f180d0bd0150ef364f659d0fa4. 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/QMFMG1395936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdceb79d7b640c6bbccc8fef2202070e38bd8bb2fb729c3f7ce7eb90b283b12. 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/QMFMG1428005.
The Music of Cuba - The Voice of Orlando Vallejo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fed5a92fef235ddeec7307671682d18e9dda3017140ee7d118d3ef0d3d66f16. 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/GRHR11009402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b9e7c58fb19f9793ab549cceebf21a40e7ed51603821d7dd965832da88b60d. 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/GRHR11009408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa463348f23de3ba5d50e3dc8c01a175ae0c51ae1689c7ff3f138dc3141282259. 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/GRHR11009409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe073bef7cf511ca9668c6b55aa9e823a87a93bc5ad79e6443633905e03f2ca30. 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/GRHR11009413.
Afro Cuban Roots Presents Cuban Feelings: The Bolero Era
Añejo Carta de Oro: 100 Joyas de la Música Tradicional Cubana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81baf1ce7fc160c1bdfa20c2414161002b17ac1525c370cd6aa6c382f3c0ea7c. 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/CUA021306773.
Afro Cuban Roots Presents Cuba's Big Bands
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ce34430937e5180787eadb87ca3534aee44caf10a53157ef2fd69b4b599f56. 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/USZZR0810411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab73a8996b6f0d1fb22f1ef517b10de5d52306f479b1b67efb2bf28e52b791e. 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/USV351371077.
Ni Bolero Ni Canción / Pinchame Con Tenedor
Centenario Roberto Faz: Sonero de Cuba, Vol.1
Cuando Se Canse el Guajiro / Más Daño Me Hizo Tu Amor - Potpourrit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85b248fcffe4a153cab7724d53994b909a5522723b14e30d2e0ae3727ed3d5e. 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/QMDA61480479.
Gozo Más Que el Que Más Goza / Amor Gigante - Potpourrit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb44ac522c5a13d01b550b9bcb25c7d406b4b8b59ba9dcf6109399b56fd56efe. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QMDA61480482.
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
Centenario Roberto Faz: Sonero de Cuba, Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42c26058c2575f647023c59ff8eed966955bc8344ff7e1317b93b7a9b534503. 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/QMBZ91401518.
Vintage Cuba Selection From EPs Collectors
Mambo Cubano The Golden Age Of Cuban Music 1940-1960
The Real Cuban Music: Guaracha (Remasterizado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd0b90f26b8bee34d60bea9261de5f4f56a1a395fa88d977af9f418d433a0c6. 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/GBVUD0814650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64426beb9946a00f04dd1ff49548b353550e68f9dc5b0b430af603265f32790d. 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/USZZR0810545.