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 0x346ca0d197be4549cea24df10bb13d74df00ebbe88ce5725db70df26aca8d797. 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/0d8e8240-fb4f-48b0-8957-4d6f1b57d475.json and https://artists.proofprofile.net/proofs/artist/0d8e8240-fb4f-48b0-8957-4d6f1b57d475.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 0x9cf438216fb1030aea85fc14b589193d0a0df3c0409397a9f99273fc294bf8ae. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFZ72248405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866e4a963a1b5ba1beff980a3f5dc053b2eff9a692aa87b860d36d2a5c531b1b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6N2231771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39d6019e0ef5fe7af6c15863bd53fd6cd7c3c17f02bbf2b613cf140e57e4b17. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:42:36Z), 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/QZTB72369625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6b75f559c1413765c708c71da761dda49961642421009fc89c86f9a76df6a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTB72369626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe109d4dd11818b7c0f68ab30fdc652c5d57ebc55b2cca9a3783c74f4d697da6d. 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/QZHN62455891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe109d4dd11818b7c0f68ab30fdc652c5d57ebc55b2cca9a3783c74f4d697da6d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN62455891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa123a8ed38971b5f3fc4a007ef64d514d1e0e58be45256a092ac416aef1491f5. 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/QZHN62466151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79215c44437daf4af9ffd0c8e4713d6e58a939b0312d20b1102142d7054c62f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ7P2485304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1691dba1480b182c699364ba352f6e3ab7c07baf9e636a2c452f4c35348580. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7V2493949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8d576347e8e2f5a0da65dffa13307c9baf7dc3ae486511e9ccde6433c3252d. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZDA62593850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1dbd97ba627f8573635dfeaa459bbf0b4d0451c86eebeb94c5a951045b5a8a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHN32527305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fd73bd4d43f81cf61c9735ee7df07a4c9b6c5445aac77f5b9118a6cd65561e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN72571798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b4f9075c893e2c27ca552d7bce117b047c596db326e622cd528762e59705f6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWY2560205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89d25faafce8ca351af8e699ce6cf1235fa2607c11929a06485d7bed1a6c406. 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/QZTB22542558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f0493e47c42c83e355183105f6c1fc9d2e3aae9e9dfa38302ab2087e1935a9. 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/QZZ7T2553473.