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 0xb72abf3fcd7cab5590dbeddfef4f9d8c46e3e319bdda0602c541aefa27fb6db4. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/444b7e13-262e-493a-b5ca-fff53c109dc6.json and https://artists.proofprofile.net/proofs/artist/444b7e13-262e-493a-b5ca-fff53c109dc6.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 0xcc07d7e29eb5372a9f291a0c57afb042358ed762e97bf6df36596bd6fa39bb19. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZZ7S2408432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e119edfc07ca542d3b7f4393a5a7b6131d5dfb53327c9deb3a034b51243623. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZZ7S2408433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaefc9cce1dafd6dd57f940a55f7ad5540ef572f6d63d222722852ce4e62d70a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:16:03Z), 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/QZZ7S2408434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2007031fc02233086a1625cbfae4d0608b2dbef08cbe0161efe22f106d5634f0. 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/QZZ7S2408435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe24ee7f9768c656ce081850c768e815e83b08d79ad42803e81c2568f8dd05d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7S2408436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90418a7d2ea83de4d0588d4b93dce41370f0a8fad85c9f0edeba4f10ef77fe28. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN52510146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffa79482b41bd8a0256452a1ec0f63ca51c6af54eea114b275c3c3f0db2eb0e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:53Z), 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/QZHN52510148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7499eb2400750dd6ed34728a6ddec97db6bc73793a26ca5a8dafb08c5f44bd34. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN52510150.