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 0xc421952d49aba87abe2678616541dd1a3f08b7da8c0e6c96973f7df121b25263. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b104997-6d74-40f1-b4a7-cc2a222810e3.json and https://artists.proofprofile.net/proofs/artist/9b104997-6d74-40f1-b4a7-cc2a222810e3.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 0x86ae0dabd2131db37843388145c3d457fc74ee48cb12afc4f7572d1d2bf2e1fd. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTB22413141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a33b366512100fe9fe084d3a2b4b76d2639ee43bcc56ffebfc6990e2dc51306. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:22:17Z), 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/QZTBB2486061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5384e46075ad7a7c3f8f132a87bb667661a13bbf8183e478dd53a26de7ddb809. 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/QZWFR2428802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41e35e8eceedbcecf34cba566a54edc3d59f8bb4ccef7015b6f59f190d040fb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ762474821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8091b9eab865bc9af82721556026e734e1a54af2e89b4b5e242188b935e81283. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA82573768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f111918a4d0833d0c77746a52e4e89af646165b4d8c591aad4a28094e87003d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:00:01Z), 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/QZTAW2533309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a3eb02f9a6eff2cec4d4c92039a5b1c32ba38af65d2ba727cd1f45229cb3fd. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTAW2533310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21954fa9669540623662a1dbc46f6f4c20fac6c5a76aadbef94ab0c4971e18c6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNMW2582343.