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 0x1b855f773a9e5eee33576d70038fa97a62a9855ffda29ba2aa36d8e4423ca564. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d14acac-5e17-45cd-ac2d-7cf16324aaf8.json and https://artists.proofprofile.net/proofs/artist/2d14acac-5e17-45cd-ac2d-7cf16324aaf8.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 0xffd483bd6f67532ba1700b55393afaad732c53e2ce274d5c80e062a9cf4ed5b4. 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/USDBB0602614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a5acba3310363bf0a09b651cf54e4b2f4e57b7b13a2bcf3e4d684ab99272b4. 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/USDBB0604190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6002a8cb450bfaaf86e96b370e5e822bf85c91fa9684b38a9347e0b0ec717107. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/USDBB0602217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d532a382dcfa0a8908a8b2b08b2ff2e2d8114b4446a21246a571f1564d280ae. 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/USDBB0602170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4add0f2fcb47beeb4f2c2c8cca9d029446977614ce034320b690350af1f3ad6d. 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/USDBB0603984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9def7a4052c2e6647f77980f602f41f50a5a3a8c4caf9a7b80f2168feb399f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USDBB0603353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6becff728d319ebb104f64e00a3b3d591d9703fa193360b7c4c7de141ab50a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USDBB0603190.
Recuerdos De Oro.... Éxitos De Siempre Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33887d5bb2b7cbdcd8fb96561a5f459e9e9b25cd7acfd0d8e0a33e361595c80e. 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/US6R21305425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e787bf966957964c42ad23175ddb318d10919e4e13c11b95c94254476c16053. 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/US6R21305433.
Recuerdos de Oro....Éxitos de Vellonera Vol. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fd12608fce7e0cd88023b9fa5e9c996e608c4663ebebb7f0a24e1d2841907a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMYW20400992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6bf5e388bc670ac4a9329adb76fafee99010a4fbcc13fd2eadc9dce531474e. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QMYW20400993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9116e2a38f916d8dafbd358c01146b00e76769e5d48c7f5cb332391e79725349. 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/QMYW20400994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e831ab8a3c1217eef5fff06471956dfd31db287fd8d17bdd4b1fc3d58e20ba8. 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/QMYW20400995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc2aac9187d11cd4bacac862f339aaf6b7ee1e48d9d8699f4a1ffa64dfbd3bf. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QMYW20401000.
Recuerdos de Oro....Éxitos de Vellonera, vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d63c34f6d7c536c18e5173023d69e65aebe1b4943b6dba557fa05658c468b1. 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/QMYW20400882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2822c8ae4ef8a54e86a66906494449597621da6e65a6c031a7dfa0f24c5b9bc. 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/QMYW20400883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf509b5722a614d11f793473b1c812609d5d3ed87931b2c5431becf8f194cb3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMYW20400884.