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 0x8126c7b8b35b7847af7157a2f70a5171b411649fb2d6b54f93d4f8ddff3acc61. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69d97840-52fb-4be1-b6d6-d32ce00e1c33.json and https://artists.proofprofile.net/proofs/artist/69d97840-52fb-4be1-b6d6-d32ce00e1c33.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 0x6749acaaae96da81b8c03c59ecb3ba8bb86780307a2e483bf04095ff13cd96b7. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZ4JJ1718303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd76bc05e1ba8e19ed07eee7282026de2462aa51e8bf96de2a4b2f29cdfabf3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM2PV1741376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c24f13fba927987d74529c5f1e8687fbe2de0d766d55309fce3a0f66377403e. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:32:13Z), 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/QZ9Y21707757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750766e338ef477e09c18ce4d6bd5c279ea7d8ae27f2daddfc099a284f20980b. 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/QZAPG1826494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7c320b3e06da84724bc8b84adfc77df1f87fd85a219ebae29a4b881bc78a43. 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/QZAPG1826499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f6e5c3341beb1f1030268c3c0e011860746bfc22d3eaaca79badb5f600fa4c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:01:04Z), 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/QZTAT2113982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a4d720908dec666b32225ce5ef231f1c2254dea51610a750434e1419c05f9d. 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/QZMEN2331208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c762c964f8c75124530b2fe343e9db549ddf8c2b771964d6f317fd56c740ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1820715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896a340d5389e0cdcd17188677079afdc7857704a9cc9afb962941b6a0e8c50a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM42K1739679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61143219fa1fe596ce455b3aeb9b67e748ee0cb554cffa713d004616f7b8cc04. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6MZ2113141.