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 0x0eea437feca7ceeaf14284daa7fe7b548cd589c141153467959165d9def5ac5b. 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/04550c43-4985-4e6a-8937-ea72fc6814a9.json and https://artists.proofprofile.net/proofs/artist/04550c43-4985-4e6a-8937-ea72fc6814a9.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 0x5f14420b4468fc5daf9e9b24f9eb5c42fabfd5f84414fc8d24fdb83d29acb896. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM4TW1763099.
Sabrosas Norteñas Con los Madrugadores del Bajío.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2ab60fc4dc820bc3ff03103a861b42430cbc8e608ff4babeb342533c67586b. 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/MXF017200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe759b2639fb813e3f341b1af07b115f7ac35d8da60b1c3f3b268f32044d08c0d. 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/MXF147000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08acff4fac6dff4f09a4768436d13b1e11e97128bcb17275b73f3dabc674871. 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/MXF017900699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c60ce2fc788144234b7069a0f225e8c2e56d7c4b84ed99cddb8a89221a948a. 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/MXF017900700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326c743b64ccde86ba64cc43bc855cbaf5a5bfbc6a09fa590c7a1708aa5bf405. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/MXF017900704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9946761ad4c8f863588485d1260cae1a8534ebe049e2344be905d8a2cf8adc6f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/MXF017900706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b283ff4a1a9f7c057bacc43c93526fc4ab8d79ed71fd8d521c8e006ad00b43. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MXF017900707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f21c18e6875d79cf61cced3c61ab00b670d5e78192812396a40ad2509c76583. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/MXF017100520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6b96516e72bbe827c5942baa26dc1ee5c450d72d7b2ca9614522085d207599. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/MXF016600936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065902dfeaababdd23e60c4ea0fcf87677ccbe66725e63b56e2a03f3b5804281. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXF016600938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c59d5bd21bc926e297af350c8d0b6c1ed496b677b80b5645be26b6d663c148. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/MXF016900565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6eb3967dc33c19b2092ec7a6b57d19d8d8680c2b8c1a241f3cbbc13d6b12661. 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/QMBZ92041430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9866a049890f8b154118a5549bb5433681ad9ac38eddd0071f00e7145b1b901. 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/QMBZ92001930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1015b5c504c48ebd9a6ff77f14e1b36370371f12e9175bc83c6dda911b5e261. 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/QMBZ92001931.
Tesoros de Colección - Los Mejores Duetos Rancheros de la Historia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe759b2639fb813e3f341b1af07b115f7ac35d8da60b1c3f3b268f32044d08c0d. 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/MXF147000030.