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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60218687deb83b6a866582ecbcd827e3278678f8118b4ecb0091219be83ec308. 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/347db85b-c0e4-43a5-b83b-8418728b420d.json and https://artists.proofprofile.net/proofs/artist/347db85b-c0e4-43a5-b83b-8418728b420d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5768c0a4d72997c7d4976d7d79b26a32fd4773121e84ae48df5fe46abd2a4b16. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QM2PV1558958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9359146901a92d8579fc0f74f52cc849a02ceacff84998e24c011064cc0f7e14. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:03:19Z), 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/QM2PV1558959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af20693440ff0a5a5c0c39b21ad37664db564addf0ee566c3856997cf493e64. 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/QM2PV1558961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e11863242605780decfe10d7b9adf3d3c60bc9ab26e0d0db9de287fb43415a4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMFMF1396272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857ad3d63df71233a064c362cd0b5690950a5cba16c6dba95122a532e719c7d7. 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/QMFMF1396274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a0cdd5f664a12ee33b54cd7b6b4fdc4f4c80dafc500c4441365d49aa147e80. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/GBLFP1865186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bf9533900d864a9e37cafbfd8a3fc3ca7c3dc787d3345e63f5e21dc1c9b0ba. 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/USCGH2179177.
Los Entierros (En vivo en el Teatro Guild)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfb1dbc2b86efe76815c5599899dd1b131cc7d8b682be94594e8ef964a5f2bb. 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/ES71G2418615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8efc1350749acb59b03f3cf4ad11c41411271e8880872421cf25ff50519a81e. 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/ES71G2501391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b8472e25f913c75cefd0215efb5ad44e23be20f7bb2308e1f06b8e3397450b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:39:14Z), 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/QMDA62588169.
Los Éxitos de Lenin Pulgar y Amor y Gaita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df3ea0c9046f67e19a7fca8acb60eb84dabb15d74cf12502f611e6adbcdbcb7. 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/USHM81831822.