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 0x56374a8bc8691ce5abfeaf6b81d17ddf4e1f93511090fcd73b9a104e270a0250. 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/4fd24067-86ad-41e5-b7c3-1edb837c6d2d.json and https://artists.proofprofile.net/proofs/artist/4fd24067-86ad-41e5-b7c3-1edb837c6d2d.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 0x3377de39e82ce09e0b11ec3344ee06e19c18f571949418d0ab966b6cd2bc53e9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1719534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dbf054d4ddf73522ba10317dd357cf074bcd5e6643cd145e9b4eb2dfeabe0c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1719531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925b88e4c493e54883232260e8b9ffb39a638116cd826fb240f91db25a88d6e8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDHM1719524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7766c9566a46db7979d29695e6b60e201a551fd3463853e5a355a4752eb72cdf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWV2043080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b03b8892724ed7c4255a44e0f19f40e312d3f8d13e9b1fff6a2328ced8fe1a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1719525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3062f6b87db92e6dfa68bc480c38fb1407d596a7e535464416b25cd61257687d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDHM1803101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c648daba4a5ea5e54cd069778190ece374f97cf23d186999cb1f0a6d70192a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDHM1701765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc63344987a4dbf5e14fa0f080aa345ec462dcea259039dc0729a672a7ef9352. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDHM1719543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f4fdd0b7d0f62b7b71bd05428b28d0d8888cf196b68957df9555c14076e5bf. 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/USDHM1719533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf19b7e95fa22ee2cf3b1e57188eaa9a41e18a86f073a36fb14f4ca3e3a68dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDHM1719532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab30e8f4ea581867a5ac633a6a2573ee7a8a3bcc2ded938fa76454d5b95b4640. 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/USDHM1719542.