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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf592694c8d48961b6d22b0476bf7565bbdad8cb785a9ca339924d50f977b39. 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/691074a1-a23a-4c1d-908f-e34e56b2d44e.json and https://artists.proofprofile.net/proofs/artist/691074a1-a23a-4c1d-908f-e34e56b2d44e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
JJ+E (Official Motion Picture Soundtrack)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c9dd76af4790db6b502a13bc162aad61ab8121fb30fabca52cbd2f7f1a783c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE2EI1100728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470d82e1968c3130f18cb3cb39d13ff373009084b96b2cd8de74ebb01b262432. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/SE2EI1100733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fce4520f15e915add06e0ebc61b5f5d1c3f1d80779bbca4d86e6a1720dfdd95. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE2EI1100734.
Vinterviken (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8998cb6792dd62c61a9b06ba09d1c172bc53c1a941d3714d7c5e7e7821f1a54c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE2EI1100727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4d011662a5fc32ac99a2f5bea6c022104c5b36db4b27ebeae7ca833401adb8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE2EI1100730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90804aaf7b3467984da371cbd045e2a412fd963231dbbca918712893b7b5ed11. 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/SE2EI1100731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d83c35b3035bd62ef5c8e301190e7d1730f197c2e33fdadc63c25b9dcd96fb. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE2EI1100732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fce4520f15e915add06e0ebc61b5f5d1c3f1d80779bbca4d86e6a1720dfdd95. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/SE2EI1100734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5792daa0a71a5c6c1f35f3b07a911f13051c7bd2919d4aa339d4a819f5f9e36. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/SE2EI1100736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed684dda94313a554626c9c9a257a38c5a42d0b41732aa645d13c1ed0d5ca3cb. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/SE2EI1100737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83a968b78d9ca4bdc4bf745c815b3080d3eba92441b68160eb6b11faba49a92. 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/SE2EI1100741.
Top Dog Season 2 (Original Series Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc955513f1ae73e7f3c8172463270421cfaf3c4324c9493f86ecef5e5276c7867. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE2EI1101071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ab6924fa38db6d550af6a2fd1e59a4aea5b80d4d63e94d800b14be5f702f89. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE2EI1101072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7e5a9940fc557bd93fcb009cdcec50b6735edf2653514071089c46f949eb56. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE2EI1101079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa2a2e1c71310ccf6644479354f6c91c726200422469c5fc6b8f7f20b485d59. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6TS2100102.