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 0xca749e47c3a7365ccf3cdd1d5c41908b013a21dba1672b0693ac764049613f6e. 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/02638311-1da2-4561-b5b4-c72152e44698.json and https://artists.proofprofile.net/proofs/artist/02638311-1da2-4561-b5b4-c72152e44698.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 0x972ed7372594fa78a92c848eb6e0994614149da9fb321de89b3e78aa512280e8. 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/QZ5AB2230297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd589b27a52efd14b65b989529b17d9267709eaf1e831ddff7b79ebc41a92b68. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZ5AB2230298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf016d3bc4502fdb12641208b33437daa992a1deaa8e2d899aa21fc34c3a104a4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:42:46Z), 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/QZMEN2396498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc593e170d522d02bc88cf892f6c8f51585a8fbd00eb2eafa14bcabc964e2c78c. 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/USCGJ1951290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a7ee6709132ede657ecd6be55b99496036e4858fa38828a88ff10dd42229c8. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:12Z), 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/QZNW72413715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f1630c810ea88762cd08960a0aa3e085b54568989c215aa7e2f0c77ab99cff. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:38:08Z), 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/QZNW72413719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f204ce34570c6d8a41d2b347fcc536212048d18b602cd06836c640a3a9a57c. 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/QZNW72413725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e46c6a26359928660c75619fd0f1296e1626e6c99b6a1e34b6240b06215d21. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNW72413726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053cbf31d2f7ef33f11ec8c93eaf6ede804fc20b190dfff2feceb1cd1fdac6c9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AEA0Q1926321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cb4aafb97189d38907e843e596d13d4edd5c1f7552eb5a9099b5c47bea9f5c. 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/AEA0Q1926322.