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 0x0f3645104af300db1ccfa8fac83c22656c48dfbd375d388de167de148a089817. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a583acb7-dd56-4c5b-8f2d-dd5fd31cc7eb.json and https://artists.proofprofile.net/proofs/artist/a583acb7-dd56-4c5b-8f2d-dd5fd31cc7eb.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 0x71c27a3759de690114099bf3738cde9d7fea2bb6947070e6c259d83dd3e2c6c8. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:38:27Z), 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/QT6EC2560270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b676a2d252992cbbfe4ccd3155de93e6cadc768c60e8a877703fc8b21cd029c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:30:57Z), 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/QT6EC2560271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44316f59e4a111ea963cb7a19cf2bde78ebe15d0cf7632e513d9ef6b9169ed6a. 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/QZGLS2360572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff3f0407b780b0783c04d584f14a90c03091603119d28276b3d1842f74442bd. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:41Z), 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/QT6ED2560996.