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 0x0075791d85b1e6bbd56e0ad279edad1a5cdbb098761e6c801c254d5968901d1a. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f213de3-9eea-4414-9709-92468cf2f015.json and https://artists.proofprofile.net/proofs/artist/4f213de3-9eea-4414-9709-92468cf2f015.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 0xce059e096dd2f3c95ff6a1a3f2d5a93c5891d5431ad6c4688b9b52f1f78f4a09. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYY1999761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86064317e4c391e28167048dc2dc30dabf329ff25f2d6be86da26cbb6d640020. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYY1999762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7732f937fe36ed3c20a1128b258fca7b77cf8dccb18a58a9f424b8fa1784e708. 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/QZHNA1933345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2de6e605a2e5423a6dbcbe9ccb3703f484fb60ad451019faff1a9f23e5c7e2e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA62330269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41274088c6fa90c348ccd5d5f43a4e948dc77df75e561f8d9f7943112f7bde22. 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/QZDA62330270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ac88931c64a4ceb7d91d7319a90cfd755b43ccd55c657b4ca361a47923b1e6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:29Z), 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/QZDA62330271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd69850e384a52b1bb26ede944ca6451caa3b7f04a311d27084fa76a04bd3e8d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62330273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5a3cf5486715aebf58c15561111dc557c542d835cb2875cf29f8e1fa43f53b. 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/QZDA62330274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ece40f3eedc13249d127714a05edda10454f68e16b8a95ae8fca8462c408b8. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:44:21Z), 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/QZDA62330276.