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 0x7626c33b18c354d5278566b40b94b3d85a641c85bd1af90abbaf53635a9adff7. 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/b321c2af-6817-4ff2-ac3c-a715a78cac29.json and https://artists.proofprofile.net/proofs/artist/b321c2af-6817-4ff2-ac3c-a715a78cac29.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 0x4c292b9fb0614468c39cc9773cbd0f5908545086c6aa0e317b6ccf3653ad447c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:19:37Z), 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/US3252100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9c04c13b3fa581de5dd0938683cf1128a37cadc4888694b0c8a36cac4ce473. 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/USHM22429492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e16bb861a06b8ace2aae28f7adbb1294748daf82b33fb9db6c3ff1ee7c2f025. 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/UK6822420764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee35f6d5f2fa289c7fed4772c9006fe940177ce82d2b6fb40f1241905f786f6f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:43:14Z), 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/UK6822420888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2228fe3f0a040629a545d9722d56c56b08856207f4f4facedaff84da96f333. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:32:37Z), 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/UK6822420947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5162dabf907b4f609e8f1d9d385cd3bb2aede6028006eb6f5448391b45feba. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/UK6822420948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e16bb861a06b8ace2aae28f7adbb1294748daf82b33fb9db6c3ff1ee7c2f025. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/UK6822420764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba97f4aec7a1224ab6f3aeb3c27688056242894442a300afaee9a539e3b7cd6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/UK6822420949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e3ea61481d2f58975b1975492564d2d2de9a24667ee75964fd5e557b9b9395. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2073102.