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 0x7f98618b303320584d7444398f51f3aa991b59ea7f1fb2fdff922e6d732c2b3f. 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/aa35a9b4-dc71-4212-bb04-7d4217701ad7.json and https://artists.proofprofile.net/proofs/artist/aa35a9b4-dc71-4212-bb04-7d4217701ad7.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 0x928d70b13b7c64e5b69c95b74848f145212bce61bff5c359edaabb4405c83071. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:56:41Z), 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/NOCVS2103862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99768d597cd7ae7a99b910eda912dd514ac2d1e7321bec82a7fdac8a15aa6a9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:17Z), 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/NOCVS2103863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d98483452ee5b359d701f06061279ac692fa7d0e04db2ab7c43f1d36dfc26cb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOCVS2103864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9521112c67ec94cf14135fd444e7f2401a7d0c95363d34922ab2bc96c1c1df7f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NOCVS2103865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced15306e2ca593f66e705aad85545cd9dfc2f06be29e15b049f561825bc3d48. 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/NOCVS2103866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a400b447e2f837a9f4035437bb1c57eeaf3a35c400f7c590123efc8a5410a5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:29Z), 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/NOCVS2103867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8479583b3280603431948ef688ed31fdf297d9c91ea0d23cb37c8a6176378e91. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/NOCVS2103872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d26cb0ecccb25e022a78d6d85551b4c5da4795de478e47ba31a520e6d43215. 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/NOCVS2103891.