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 0xe0b9fd81cc945e734a92a108c88bb8f31514f9d9383a6468a6d662d6955b46e5. 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/a2366164-871b-476b-aaa2-fcd8915caf10.json and https://artists.proofprofile.net/proofs/artist/a2366164-871b-476b-aaa2-fcd8915caf10.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 0x7af551ed0ddbff50bcd33640e44631be0df383a7744f799c76ee9b399962dabb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:40:00Z), 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/QZDA82238768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb127f570ddccba46464b959e14d7b8d12636b6b0e1ca20cb8da4dc656e56f480. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZDA72259668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66259865f30736ef04e5a9e5162d457133a126679bb9d69706f549d6b88f3762. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QMFME2406592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efba8a8b10a8e8518f14f3a5080fe77634ac50c35bcc820df823dffed4691e8. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:42:59Z), 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/QMFME2406602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05851c6376d0fabf475341cdc4b00f892ad2881763115ca7ae9370d36c7fdab8. 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/QMFME2406593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7b0cb1bcf952ad4acc1228a047a75a448473f3ffc52ec3a48cfd027aaf0528. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QMFME2406594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4f6666991820a1079b9662d692875e3966b544b2ee0a26e74d9c6aaac37f66. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA72585067.