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 0xcc2e125f1f13a48a90654a09b14e6d8ba9efabd00a15baa18b30653b86bb7621. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7052b547-2fd8-4b10-b4d2-66d2bb5a074e.json and https://artists.proofprofile.net/proofs/artist/7052b547-2fd8-4b10-b4d2-66d2bb5a074e.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 0x43b2d0167c88012b0cd2b212c7c6b78c6afd038ed2377812113819466e57a0de. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAEH1976742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6421175a417bb62f357a8773109fed68b694349d14ea79eb4f240b1e0eeb2690. 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/TCAFU2108024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db7dde40bfdbb96309e4896fa86f5bc15fab5f784faf3c8427b037308bece06. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFU2108043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557fcdf5db211c1c6a6e2402248f987679195cab1c328058ea3be6712e3fc648. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:27:06Z), 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/TCADN1852673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe10d6f34aea58c0fe7c38c8b7578ac8c7b95b6c70c3f9f938978b4775c040f. 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/TCADN1852732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0408b6ad35f893e5b28782f2b18556476725f268ffd7536d88f9306731c7aec. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCADN1852737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec374b2049ea150706717fa1a5d77aeae2c29774d432685a071967562007cefb. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:32:25Z), 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/TCADN1852763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9735ec1a4976ad7265cb054bb5b649328d0c0a48568307cdaf15a5c1790f91. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCABP1316738.