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 0x1026518e16f6559bb326e486a98ca24aa23cae25082bb4e58a7992eeac1e8d25. 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/5f36b746-0692-40ae-926e-9d42d7344a96.json and https://artists.proofprofile.net/proofs/artist/5f36b746-0692-40ae-926e-9d42d7344a96.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 0xab35d5c25e2cedf6b4d976f8403f47507dc9c2b8216d1f2359106f738aa98508. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ES5630700509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9f5886f7b70cee4ee5e542871106ead425cf89d668f7c56e8bcb7d06b590e2. 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/ES5630700511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646c619d8839e51e50433efa08c249ba7bf8cf1f147253b42bf403ae7e0110d3. 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/ES5630700513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e648d0afb1619822ab37c381f0e8fd15ad71cb031600977cba6c57e47b1c619. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ES6670800375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cd649270b14a4771ec4b802da35b7deabc46862547b2f2924c0e0028070595. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ES6670800377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015ae937aebdb934aa0b4ac504b827513fc9562e2604b2bfd6a0a3b145b3272d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ES6670800380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666211bc84d074016922f77c570d6e15cd88ea20ab0f0b967b6ece291a7f8080. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ES6670800381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37015c8f32fca92ecde10bd10b53b2955f97de7414ca096cb79dcf74384b016. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ES6671201377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9987f43c6e25a4e8191559ec647cff98fc9fd82f2afdd668c2e7dc1090b26d3b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/ES6671201381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fd293312dec733d33d529bb925943c08d5fec8f0e0a7062a56c0670cedd4b4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ES6671201382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170efc8cda76aea7eb267fabc19a5d243025e28fb2b83b077d995eb9e9bb8b5d. 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/ES6670800363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652324c60e9d2bd07cadf5dbbbde66484e03f5b2a215947c23a7d1396a439220. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ESA061500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafec3d5ebeca75ae2d2f8cdd29fd5b1b28884b1080f0ab2b99e231048f852533. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5350001799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f16bfac61e4299bba942d685e0ae6d5dafc0c0e8166456f60f1e2602b450c50. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/ES5350001800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c69563d229e686dd26c104c709591c8c595a4ddcdd998a88e1d82c59197e43c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ES5350001801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ebfae7dc71f04abcc31479bb1d3765c9ddd81f8f00f057ef857102960cddcf. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ES5350001802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb746aa005af6c3f7f7bd4312fffe05664a2e140e0c8b264b211083554046cb3. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/ES5350001803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdba2f657aa2450993cfb1ababe88f8fb68d7075411f8b9ee22f7f8df06955c. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/ES5350001804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149c0b713513b01f18111d31c44c1895db91fc0dd7a35e7fef1e73c5a55ac4ba. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ES5350001805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c427588f08ecde77ed1ddc95f29cae99d839730fcd1df2374d4546b307f7f29. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES5350001806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55258dfc8adf5f0bbd465f6cb6170d1164349774030ce9986f4cada4b5b8aecd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ES5701901651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a64aa16d36ec3bd2603f150962fc377ece8d91137636aaff0d5c613eb29e1a. 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/QMFME2299355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd904ce9c6b57eb828104be2ecd8d2fb0bdfc606cc5f1d48b1be97336c71aa734. 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/QMFME2380652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d2654581ce690f7d689d51eff34183ac18594cf6e324f6a040964c93798c16. 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/QM6MZ2433125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918092a3b490de0217692edc40c56fddaa26e2ecad8c762540077115dec0c6a9. 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/QM6N22498950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd447969aed620a0cb73fe513700f902aa2abc8286388b899119efa2090f9225e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QM7282506003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6864301c0d7118663cc2bbf33fa7e760ec1ad8d13da20559705d49b9e9f7b411. 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/ES5700600614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2550b13ad6e4f856a0792b0ee65ef5b0afad466abc50b212c4fa090fc1f24bcd. 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/ES5700600616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6864301c0d7118663cc2bbf33fa7e760ec1ad8d13da20559705d49b9e9f7b411. 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/ES5700600614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2550b13ad6e4f856a0792b0ee65ef5b0afad466abc50b212c4fa090fc1f24bcd. 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/ES5700600616.
30 Canciones. El Boom de la Rumba Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f01b2585a0a3bfca6a8bfc56594aaff15e3e1b492c570589e141cd1ef5a8b24. 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/ES5630700514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1330e9c1f101766a12ad8548dc2559a330a20bb3bf9740c5960991795d5dce30. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6172020202.