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 0x5fe5062713009e6caacb66e648ab73dc40fac8800c2ab2a43b126ec934bb1cee. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f72fb5d-0458-41e9-837e-9fa5ecafb322.json and https://artists.proofprofile.net/proofs/artist/6f72fb5d-0458-41e9-837e-9fa5ecafb322.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 0xa167b6ca6ab024118ba0a97e54e0dc6dccc14843a23352cc4a62250b3c21c96d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES72405980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a66793741db0ae7d7763861df6871ca0e29884e944b243fe97d8f1c44e37ec8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZRP52477979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6dd83d2f725bd1318b5f840e319a84942a4af5153b21ed4a1969f58505ae87. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZRP52477981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a4370ebb46f61bea0a372013749b28bbf5cc446218422129527ffc1021876c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZRP52477982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce81c22f827105011a61d20bd22075e50dfc6ff77e1b834a63f53d48035f5d7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:24:20Z), 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/QZTBB2439093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652756e02aa34a6944ca221572dea34a9950fde1632b9db0d6bdd816251def28. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZZ7S2497677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a27eaf0262ff8616f1205ece1dab9829688bc588731c70397cc02cfb3c442f9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ42527774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06f0454029158642ccbf1f9f99bf41878974ee9fcb579ecd759e7e00f86be38. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:46Z), 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/QZHN62583876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb454ce85c10f30dbf70890ede8f226c7a7dccb3d32642b9f2a49283955d704. 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/QZNWX2514038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2f0fda28f88493c50b982631851ca3630c1c1e28b7bc579d7bd67f80ffc3b0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFR2548176.