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 0xe6966cd3a10169f2df3fcfa4819bc4bc075de042da8d5618b576dcd6921c3aa6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a825d8bd-0362-4a52-a0c8-c1b2474f1c17.json and https://artists.proofprofile.net/proofs/artist/a825d8bd-0362-4a52-a0c8-c1b2474f1c17.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 0xb7a556b18475fdf62d4de358786e902fda473108413fd60b48ad8932372c24a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2125432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa62638144f105d48f7795cdfb2e251d7f8d95d271c1338db1da94ce5bf52b1. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR2179048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6665ea6f61eb73616215fa74c21baf971f7a4aaea4fdc48559b45377de7e745. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:56Z), 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/QZTAU2118812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b909cfe94c56114cb77ca19eaca0f273cbaaf91d4913a72b2f3a4fd05c022a0. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USA2P2204080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490d37197ccff8ee6e9e6f3af92d1196b38a7d71d59f029c9ad7e1a90d0d91e4. 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/NL8RL2434898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a717a38766be2a3c9e83849759e2383145fe9a22d346393c2581de991e290e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NL8RL2437709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014545cccea1cee9940d60cd6cd4cd00635a3f389c57e9f9755f04b27fb4ae99. 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/NL8RL2442856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abd943b2e5f44811b705b8dfeb62feed1db813ec2d5bdd30966160d9dea4aaa. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NL8RL2503906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa400b8d1f3ac901e1da8d2838bad5d210032e878cbcb9c54e58334ad77dbe9b2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:21:44Z), 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/QZTAZ2580122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fb3e6402df2ff7f83c6904633fd904ad5376349393fe57f3b1cf8d1c608818. 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/CA6D22100243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fb3e6402df2ff7f83c6904633fd904ad5376349393fe57f3b1cf8d1c608818. 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/CA6D22100243.