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 0xc5dda2f36fef386ada140796dd98748d0644fe34b12aea5e4595c8b4ab846be6. 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/b89e0b54-5c2a-43dc-9e06-7ccb60617fbb.json and https://artists.proofprofile.net/proofs/artist/b89e0b54-5c2a-43dc-9e06-7ccb60617fbb.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 0xa22d31e94557e0a08b06bb74dc301b68514bbeb7b0829a6aa4fba7e712a5dcfb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMEZE1817337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7912840800158f7327d90e2cf159fa6c9466d9e2e88132faa869f55cabdc5982. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USDHM1314391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4404d00f252fe929b49fa206a8c4023b473d5804b49971abba0851dc067d5f1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USDHM1314392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc034937b5757a1c6e0402370a932a8dafeed8feadc2f42eaaf20164d6ebacc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDHM1314393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126a6ecce2d37f7ba80e1d28d4f4ea8a934f766acf040ab37717c34240c6f474. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USDHM1314396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca77af168a55397d712d8e26895ff73404f88595c904f224ed4f6584c57c8d6e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDHM1314397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef3d0476810207b9a27173548302191002d48f2c40d871cc54ada04e702d16c. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:43:00Z), 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/USDHM1314401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5968069710fa63ed0287e3d897581bcbdf22fd08b63018b0f9f0fb79e6c5cd37. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USDHM1314403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c95af6806bbcd5219edacdcac7feabe2e5c3f7a8dba0e05bf90785a1464381f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:00:53Z), 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/USDHM1314404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed92b5c75ec32d065dd143516d9195e65643f87607aababacfcff64fe5029f78. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/CUA021410484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812473bab5b6b7a2ab7508e3b7496531fc3a01078140ee3cb93f151a87e581e1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CUA021410487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e986370e16cf0e82bb2b1282ccfc92d54308c1ce76d829629be8e33e409acff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CUA021410489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ecaf73bda7608a3e93d26c910470701db9ffc86f3960f42d04d1f16b10969e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/CUA021410494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3598a49fdc84f1a3be016ad0b54a49d71596c992369e06101dc7c9f5fccfad20. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:31:17Z), 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/USDHM1403283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0a400226d67fbb59bc672f6f535b021226c0dad637906513f383cc41de13b7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CUA021611604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb669413d58fbe919a17ac10293ff6a68ed7d8748f35c92f41590ea6ebae8ecce. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CUA021611605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3efca774a0c9cf4abc13292398f747351cf669bc18ba051e2e8c1ae82ed8fd. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/CUA021611606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be8ea37c1194a6429fb95b7d95d70e26f228e069c2896064ae1fb88255c109c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:40:43Z), 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/US3Z41600853.
Concierto Desde el Teatro Nacional de Cuba (En Vivo)
El Tren de la Vida: Homenaje a Faustino Oramas "El Guayabero"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073b1dcc598c242417934cafdd5a498d836172954ac377fbcb61e6755d1bca45. 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/CUA021712107.