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 0x1e6c3ce2cfc6f9b7ee4a8f82ba7c9a78f3080ce438869f3c8fec7c270d5fa2f2. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4bf1ff5-2da1-4283-abf6-eee00a769789.json and https://artists.proofprofile.net/proofs/artist/e4bf1ff5-2da1-4283-abf6-eee00a769789.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 0xb9a01848f9b10bfc27b3adc54316ede9c9155ec2b9257f089291cf438a4de8ce. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:56:33Z), 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/QZZ7Q2428208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f34010110f047ad4e14e8405105b34ab6652fe5cde0f097ae776b1c121747c0. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:09:09Z), 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/QZZ7Q2428214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352723b4810cdbdb0db578af433bef3acbdbec9a1be58d2b50127718775b4081. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:20:34Z), 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/QZFZ22507105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4356f038ab037713d496b82b5b552ec4a5cb5a1314b2cb508d9184c4944b5cb0. 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/QZFZ22507106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd05a8b05b407157a8556eebb908f591f0ed5cfc7f7e25eca5ecfb6c4d90656d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:16:37Z), 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/QZFZ22507107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde28ef4040effb4a8317383448859fafba81355f63baa4a410d2640de347003c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:02Z), 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/QZFZ22507114.