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 0xfb847116b969e4d4b16c10be080cbb6a8db4c6a1d089a6d0b42fb11fa30cdaf7. 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/c95cfaca-696e-4e1a-a92c-21e94928d7b1.json and https://artists.proofprofile.net/proofs/artist/c95cfaca-696e-4e1a-a92c-21e94928d7b1.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 0x9718ae27d4c2056e81346f7a6853d5636542a08e84f0395b01a19b90fce70402. 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/NZAM02003185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b2e72d48374d67ca77a15647fa68d9e57a0955de0bccbaeff2b6e10b01c15b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NZAM02103510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cec4f6d8fdc7496e3587dbec2dd0d0f1087dca664c3e1c4ca5078975fa6bf9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NZPB12301619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cec4f6d8fdc7496e3587dbec2dd0d0f1087dca664c3e1c4ca5078975fa6bf9. 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/NZPB12301619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beb3dca619f307d26dd499551ed3d61cb55dfab45fe4e5c493078d548b28a7d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:05:15Z), 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/NZPB12403746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13006034cf56bd4b6df7ee64a761cf20a84c47736075525cb676e92b387a86b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:51Z), 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/QZNJV2524854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b432d52d0cb50e47293162649097f4fafc7f0563a518fd7196974221032ae8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NZAM02002929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d5ae659d61dae49d13de02b10ac3695d37d7a2bb335fba702133300a109d38. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NZAM02001788.