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 0x8cc276c12a4250b440ec117e7811eec8d7844d49cdd59979bbfb5a7e98f540f9. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34b3daf3-3b27-40f0-8768-bb4e84ca9f95.json and https://artists.proofprofile.net/proofs/artist/34b3daf3-3b27-40f0-8768-bb4e84ca9f95.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 0x32397eab0752003641035e9921a2c5df2499518576a75272080d5b6f9e6b531a. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:31:33Z), 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/PL52J2134710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4798dfc665590e37f9ca4f819ad05c7d7c9058a92fe3f83174b72682ae97243a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:29:06Z), 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/PL52J2134711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98d6b6561d7c7d187c376aafe895114a065accaf793f9c8d32edd3824b9a6f4. 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/PL52J2134717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76190fc5183ad9af458e8ab87be7ef2ae2b7a58723682bbdfbbb884f4329e430. 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/PL52J2134286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5d25c5e001fea8aba90c2ad921a0640e05ccbbf6b9821d3489dbde5088f1b8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PL52J2134517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d781868db74ccd14bf4e3b500b985935a4afed5cf22e3a7cee65c92ebe3553. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PL52J2134516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6597960a8bdd7a22a10f75251037cfe3130e13c8821feae7ff7db4912742d0dd. 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/PL52J2134311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7594f2d78a41f0d5460e3d01b6cdffb30ad7f347e136caaa4b1be481bb96f4. 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/PL52J2134318.
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