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 0x86cac7a9fe9d943699e757fb90ae64c6669dbbe81049a091169dfdff5875fc75. 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/ffc9865b-7654-43ae-93a9-ac342ef5f5de.json and https://artists.proofprofile.net/proofs/artist/ffc9865b-7654-43ae-93a9-ac342ef5f5de.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 0xb683f4cb310b0440dca3ad77d14362df4248eb3d53ebc052258f2672ea7d78f5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM6N21448277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe993fafc143e3c03b71ec1cd81edef5df2f54d18734c6177c6c07970141e109a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QM6N21448285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfffbc0927fa0815a276fb635dabfcd3598970ef5c6ac128b0c15ed7471887c. 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/QM6N21448286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7922ce2c12ea0db08076575398b084350778d3b5090c618e02c973d470c0c7c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QM6N21448287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26884fcfa798a9bc0d66e0f2bddad9650c4bde432a3a125f6e3381a74dd9cfcd. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM6N21448288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6178799957ddf18b26aa66eec80bb5eb700c89ef85e597f5a2e66a32c00577e0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QM6N21448290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a21abc380a8a783addf77d81506677144fe87600dd4fabf00f0055142d71a23. 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/QM6N21448291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6d604999e2aaa129a35de634d741f4ecb7e15f26124625f6b70e0fc5c2f2f2. 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/SE5752145580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2627077688fd0d51586b09bd02daf6959d29938430206f5826e3247da4ed89f2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE5752145590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7bbf580fad93bf77d7337c60c48fddf94c4b2d063efb0060f64c734e9a83b6. 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/SE6QE2173789.
Domingo Che Mbotavyro Lunes Romyengoviata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f1090be10ec1ce1d7d4103013823fa16b90e9563b17a27ff757434c2f318c6. 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/SE6QE2173792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8937d01c67aac62012a7dfc42b9ecc30f6cb0abfcb056132dff88be09a5b36f. 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/SE6QE2173795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2a5924a346c1032bef70248d5c160f46587a484a137d3962e17ac9692924a6. 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/NLRD52058130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaffae9d59f867f5a8345cae48189b6f5bb43d9ac5f95bf8c17ae8f2b27bbc2. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/NLRD52058131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf5400948cbf7b10398dcba15bae15259413dbef0e2f692300d3f20f9b41f65. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLRD52058132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6de8118a2337b611e2adfaa4876a735ca3588cb2bb6719e957a388c6dbb818. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NLRD52058134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36206d516924d0fd8618b807974cce3a9928aec3a3b86e08e73c8889e191967. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLRD52058138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e6cb6a7406c4dedf5ea5cfca61436d4fe505b5b3e0b53d91e9a7050a47bc0a. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NLRD52058039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe48e15e07a24d33d4f0a1486eca14c23e055b9d8b7aaea38d76f268c990cc9. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/SE6QE2198472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac90de59ec0633140300476fb9c1138f91d5cbf3a11ba6965534fe100c2e36b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE6QE2198484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b65de61d0aa09d57360682baa3f32da3a219f6d2aecc326cc11a22857aba983. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/SE5752147106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9493ff78eb29153b6554856cecc0fe0ab632db1b2a21c54209fb01a3add434d0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE5752148365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ada29e5d3d63a74d7ae7a3f2d18a1ceb1e663e5a7bf4a5285438c599cfcda7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/SE6QE2192982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b65de61d0aa09d57360682baa3f32da3a219f6d2aecc326cc11a22857aba983. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/SE5752147106.
Na Kambia Mo´ai Che Paraguayita, Vol. 29
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f10401f8a87c1e19181dc1672191a6f7fdaaec0ba2df7e8877415232da850d. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/SE6QE2192993.