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 0x241a3827fc53e2a637046dddeb3ff5454681f29372d9b3f76d27eced5c76788b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9a5846e-d42c-4feb-9e14-02a262f549f7.json and https://artists.proofprofile.net/proofs/artist/a9a5846e-d42c-4feb-9e14-02a262f549f7.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 0xdff236f8be5c01ad192a7cf6b2d75e05a264e502b757f4efda14e45ca6aaf50e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN81978881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe200b478b8bec1b78df0d5aba71da9a9953bd1d3e4bb3bf9c80920ed52ed4e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN91906270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1995fab04c8468704c256bd95d76660610442c18c376dbbd083498ba7de9d8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:18Z), 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/QZHN91985784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd680e3068a02a12c06e9e9f93e0d03c99d0fc68846c686c49beaead9d615cd27. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHNA1922918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7994323f5b10b6c090ed0cab23e0ef1f5c06fd5b063bf52f9bf608590cde3384. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZK6Q1909241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf584fcc3ea9b400a35414e72a18250ba41d490ffcdc0a9b18aa6f423027049. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:31:45Z), 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/QZK6P1930354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f01e7d29e9b85199fa764edc22006906ff3a2095cb4e09b16668df315f7c65. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA52072996.