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 0x9bf9b60487adcf532cb216fee57b21e93a7c5c0520c081221c49cff30c6dd629. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbceb029-8ac8-4b60-8c22-bf387f8dd4a8.json and https://artists.proofprofile.net/proofs/artist/bbceb029-8ac8-4b60-8c22-bf387f8dd4a8.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 0xadd7afe5f3e751f1ac1afc9c118826290d7130aad6341cde67092d6467a6888a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GX4R52120271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f947c42baa99af760dbe4f9350a75a69828d3a9930e8f8c254d3a1a6b7e0309. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T20:58:41Z), 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/QZDA71864112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8881c65d7985e811d546df4049c9343c8f372b07bcd24167dab27e025a76da. 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/QZDA81807736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4604580bd4f4fc03583c73b3d8a4dd44d9228ca574ee9b79d2f12926ad557762. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:36:19Z), 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/QZDA81807737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc633c67228e3686986e1fbc637a3d4e5cab9167110ecfe32c66996e7556f1af7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA81807745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab40e07b9e95494bae027d42b7d6ab2baf7ba52e2c04bbe2b1dd08b0b56ba32. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX5MX2238115.
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