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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 0xc2e6eb71d90175f415df7042a4ef35f62144c3e7d011d28256cf3f621b1eb4b5. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8711a71-b8c5-45fd-b081-1645d3a9a5f8.json and https://artists.proofprofile.net/proofs/artist/e8711a71-b8c5-45fd-b081-1645d3a9a5f8.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 0x92668198c6d2e33360e565ba04340718dc022df282d85f6de76a1273bd87be9b. 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/QZPLS2397397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e29485f47dd6ca82a9e508a41a5f65eb3fd02a6329fc5ad9a5efa29f8ad7e8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZPLS2397400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5179477148b84554a85dbe2555e256848aeb80eaecf9f988c03079a8293d5e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:46:37Z), 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/QZTAY2387792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f62680959b05cf14b372911d40b737274b154781aca04b8f46931b97983a20d. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:37Z), 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/QZTBD2338834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0ed9a279160acc8990eb19eadc51541be1a692ef1e7b2557a8085892af1f74. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZWFS2311574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2201773b411eed5ed50442c801c47bdced9a3c09c29f3613bbbd6d26418b9d77. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ62446537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f62a0482e1ae9db0c4c96c8929c2cdb60ccb3380c88585fe88b616c12c6c02. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA62485054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8443bee3429619551aa165c91a36bc348dd21310ca09e7b96553472d54e473ad. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMER2474097.