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 0x5ff68e9769a5b12ce5ed8d43e62e701da48fcff861db6890e969188fbc2ae4ba. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00a2fc00-6d06-4403-bb8a-7e4f657d07c1.json and https://artists.proofprofile.net/proofs/artist/00a2fc00-6d06-4403-bb8a-7e4f657d07c1.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 0x6c0f197c3a6a02d385ce6d00fe27c9f71318590693b00392ff5f187f2c018505. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:07:38Z), 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/QZ5FN2522381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a64a6e6679a9e19ba00d9e723b32e39b4a011e2016da7d462962871d3612c06. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:01:12Z), 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/QZ5FN2586567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a7f1040e13714cf724297ac43b7593c904f875a69a1f93359dc6b67ed9cac8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:26Z), 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/QZ5FN2586626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17aa85a45c39c96539cdf5a8664a5fc811658824074b57162e82e8caaad199e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:57:58Z), 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/QZ5FN2586657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245c246c8f37a04833e0cb973402421427e18d4ca9459525c21383317d423acb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWV32578147.