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 0x55a19162c04b0282250a432bb6585becc7f157a4598a0cf62e88a7593231c85b. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57c836c7-b7f7-4e22-89e0-c52d9afc2c1c.json and https://artists.proofprofile.net/proofs/artist/57c836c7-b7f7-4e22-89e0-c52d9afc2c1c.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 0x7e883c481d2159370cee247c58d62016d379421991bbcb9905c9768d9718061e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/RUB731599576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25feaf3e2bcec3d15a82e97835f853a54c751bc3672c333bcfa0f152ceb1b6e7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:03Z), 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/RUB731598766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60d7f8cfdadd3a61369f258525969fbcaeadda8bb35acdba0c4227fd68c145a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RUB731599646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b31bab6526cecf4dded0f02e9f025f0c01c9663b27eec70dfa49738a1187343. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RUB732009305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf182fa16d430895cb32016e369b01ff72ef169ff6fccd2361daa3cef562f465. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:45Z), 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/RUB732015724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4584b783ba2f37df8480f4cf4d27fcb18e95ce295db5f66ed1e4107ea77a9661. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:30Z), 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/RUB732015728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2896ed35cf2b058be2f7f734c1af09426300c4dce65fdb39ea3979acf05ce880. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUB732017839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b951e558dc93e9bada176c82aafb4428237214429ea62635319b1d03abe4ca. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUB732017634.