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 0x3a6890c3db5ec36a49f49b11d6ba7ed1646ae48670315c12d546535f7c4412a8. 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/ae6a67f4-ded7-4afe-a7ac-0a7d3e1808bd.json and https://artists.proofprofile.net/proofs/artist/ae6a67f4-ded7-4afe-a7ac-0a7d3e1808bd.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 0x509c41cc3911e7569e0784a8107066eb9ff5bb1ecadff7e8a236b84484798c89. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HKG732456564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de580312dc049cd71f459ac742f85c6a6bd07493335ac3b1bf51f7d5132e5cb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732433915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3b1b466aae37b084746808e0bc14c3cdf6ebb223987d0e37575c497af778ba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732457026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672407921fb5801b0b168af170a154767354b4a323951548006ec2565b9cb884. 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/HKG731697909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597383e5b168274e8e045c590ac242dc3d5ff6451116eac99f7c02a8272d8902. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CNZ632301185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb3b1cdf187f2bbf94e35b0eb86a22e434b3533b9d4c3f7a5b76409483ea105. 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/HKG731673154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24044a8cfa6775eed9cd805694c698626f573e7596b4ba9a312f7637f05c0e5. 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/HKG732351729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6313064d58738eb690ea054a512e50e201b5ced09521f5f778d2ecc74ed35112. 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/HKG732263408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fb99cf41a5e8659568602dc0bc970ca0e589a420918b5a0447d246b597ffd5. 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/HKG731789542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5759486457aa86f129d9a6b4223419917e1fea4b9bcdf3d1bdabac22c5eea8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732132484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876f07541e402be4779310d87d365cef5576be219a2fd28a9afbc1da2f00a0ea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732120708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c33588b42aa33e4c2c7c7af5b1380f4eb7e1c0424dfb185171a02e4880d6e5. 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/HKG732102775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e9957e2b731bc0d30f23b794d4bee2116945d6480fd2e0760a2f0e633964b3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732101837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782aa58ae38fcae36a7d2b193ac4c6051bc9160e51d8149f9245f2f0afde95c4. 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/CNE222001417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ecf3779af9d0fefcaf0f21d5c84dd85a3a831a6df76e53062af2bee2777386. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732026841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed3db2876122da92bced29bdf0ca5a33ea1f517709d9bb50062e46633a65d97. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNE222000659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9c284ced2ab644e07b5f8d6317e0da8eca0e64b6289f7e2fa9e730defce87d. 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/HKG732021992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344d911ffcd3bfe998caadc311f2e2000bcd5357934b522798c568be2ad8523d. 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/HKG732008665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14efd0ce9a9bbb2b81735489b4ad3797c8cb359914cc175a240594d7d43fb488. 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/HKG732013193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea949a158f0d272282d436964af36ade9e0d826eabc84eb7b4a6cc53ee534970. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG731401926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabefd789e2d0d10f9e0caec6b7fd22056f285a63e65f0c885e33531c41839660. 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/CNE222100130.