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 0x363286b559f7c1913153c604995d86dbf006dddd42d9a2faddcec85fcd6ef9eb. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7f6b546-4c31-41eb-b256-cbb8a8181f64.json and https://artists.proofprofile.net/proofs/artist/d7f6b546-4c31-41eb-b256-cbb8a8181f64.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 0x4d1668ef14970665844ceaf01786429f1ffd46f20e424cd8f51948e61f991960. 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/GX3HH2323330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d588e4e45ff3f038894385be7dc73e9a198a1095fb05d2b99f5c8b63e2f9710. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USA560456718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a19b2e89aca723b6e4f74cce53713785388a33a9fbf8789d4e5e0c63ff7c050. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USA560456719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddc5eb4b0d560d7742d4c9ade415ad478df86b575b923be21a388e2fb081a7c. 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/USA560456720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d521e8bb6f5263466b207eea1940eba358aed8ffe64be619d8212cb787d71. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA560456721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6612aab2b54b1c89e93de733e1ea95405669023bed2ca43774bc2e1003d8e23c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USA560456722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38edf25829a9ab903dc7c8e306827d51443670e4e1784dd494dc70ec85581ca. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USA560456723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25e42ce0b178afcea8d71c99e1111bf251d35bdcdc860e931bf2fb8db07e70f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:45Z), 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/USA560456724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32754b157b527565ecd1635022d4f88f78e8f82af8da49c67dcd39483e40908. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA560456725.