thumb|A riesling kabinett from Mosel The word kabinett (, literal meaning: cabinet), or sometimes kabinettwein (, literal meaning: a wine set aside in a cabinet), is a German language wine term for a
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 0xb6a79b0afe36a5c008409a8ee158739dd1b52a05cddbf97675f20d85ad0902e8. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57531054-9df7-4ea9-a5e7-ca48a305ea36.json and https://artists.proofprofile.net/proofs/artist/57531054-9df7-4ea9-a5e7-ca48a305ea36.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 0x2a9f29970fbccf5d37bc961ef2456af507b780ae0c9cc268d39c1e1c0c258b22. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:54Z), 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/DEZC62253237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a903844ca560c1afa61d9952c93005d96ec4199cf5060b257960f66e1145b7. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/DEZC62363379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea2e68cd5e2f50912bb8e0f068d833867aaba41f50d86482cdae53e65358b4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:35:40Z), 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/DEZC62401597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071291dfccda67ddfae266db5ded1169f64c34e290f4c09b59b914a269ae402d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DEZC62440762.