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 0xc875c644f2c52e8ddbbfb75275631555ed9e837ba2ec6a1b49a10a8f56ee30db. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/991a1cb8-2c24-40d6-8717-0bdbd2bae2a7.json and https://artists.proofprofile.net/proofs/artist/991a1cb8-2c24-40d6-8717-0bdbd2bae2a7.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 0x0eaec4fe3eaf36208d40ef3bea277638d194b45e3c6caf8280340e4455a41add. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZDA62504697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc67dcc96b06a2a01eef7678875c9969086670800488b2f9567a09d0886a7b0. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:45:19Z), 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/QZHNC2568210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd437aa0939bc8828723f778b4962ae92c56e6bd86d93e69935d8b755cda7b70. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHNC2568213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e7a98c65c49afc94dde6e47d96cf386c088153aaf72fbe568a8054bb43713d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:56:56Z), 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/QZHNC2568215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf280b7313ed1a49bf49a48e56bc54de2100c7dbfacad24b93be238884cf4e4c1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHNC2568216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116b8f2a95cc58035605e1ed13492cb6c48e4d3675bcac93bd7b96d5631208fb. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:55:23Z), 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/QZNWQ2599748.