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 0xef08b097017a30ff514bbb5b31a8ecb971c31fe1e4aa1e3a7b4e73eb33185c10. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9b5e156-995b-459a-8a44-049ba0e739dc.json and https://artists.proofprofile.net/proofs/artist/c9b5e156-995b-459a-8a44-049ba0e739dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hitele Ku Cina (Dumphries Limited Edition)
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 0xe93a524eb3a3f51d11af05cb9b6c973a75cf9204d74fc8b16867ec41e202608f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:07Z), 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/QZNWY2195557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef581b1fcd4c9a5532971a60d8d6c5a67827cd9a92e33e21b23398301f7672c1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEN2278551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a920c3bc9cce855749df0c0182ff071acea814512189e29f0674f382c1d816. 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/QZTAW2397817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee70275bb4f367ad510cda9ff0119c301420bd501b8384ec03edf4f5a7c6d5e. 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/QZTAW2397813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9202233cd38fa26d88b9ffa0c684e4458c94a685c777c36106b91a4ed6ac1812. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAW2397815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2004d8c39fb63a9a9e2e078c28e2b94e59bd2c7d0d409a2e94da20c821e2668. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB72452679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1805437fe28b5b613528b540af3901f87db82259b09190325d58123d74bc8e64. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB72452680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8595020f409923b3779625b838ba52893e1b70b594aeda2801ad97a6d3a22. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:45Z), 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/QZWFG2481413.