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 0x5994632cd1d3a1e7dceffc6301b62522a6086817e79633d8887581a80ab77219. 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/d8c6dfea-1eee-4122-b693-bc166dc33edd.json and https://artists.proofprofile.net/proofs/artist/d8c6dfea-1eee-4122-b693-bc166dc33edd.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 0x1f576174f5edf0b5f1263d31a30b66966540ce79eedf4a2a08d03bce6c57f1a1. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZTAT2409221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf527b49940cd06dd667468df8aeb8f1d1a850b09fc7e7a8fc2fa91d84d93bd3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAT2409222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0cce9db06e86935a8550f3d7fdecc4ff12d8fbfa5f557f9a1bb59d6f69dd7e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTAT2409223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dbb3fb51d5c38b5e52a79dc57d239d2858e12b81c6ba5b7e58709f8fb7f01a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAT2409224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1194c9a98053dfdb6b2649456d6d68460aef3020cc9f5b223b83d68042288c15. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:33:02Z), 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/QZTAT2409225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ed7383a44534aa05593fd6a2a268abf2a063c9da83748d122492e0921a99d2. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:32:33Z), 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/QZTAT2409226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11ee8b84f404d919cee130bb616224235bc39464a2166580bafce5f816160b5. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAT2409227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82daa1be4c62ba5d731b8db390a61f2e42bd2af16a55dd7511a7fe7959eb286d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAT2409228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0be1bb52a1084f48e56e6ca881da2d3ef9c727308d2488c8341e282fc7b9c8. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTAT2409229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c9ec323456a2b0659cc6c8910df77bb1b4d36a72877a0db401b1db809509f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAT2409230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd804bbb9b35e767eafb10a58d5a26d464044785031510c99801dfaf9429d45ae. 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/QZFZ32392782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9c1a29a06e21f6f647fa16783d1407d8624c99e01ed397e25cf889f49c15e4. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZFZ32392783.