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 0xb19386f9310fc9561203e56d3e4a5e6639b88b1fa068fbfa04e8acc42eda0277. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3087bd89-d3db-41e5-adf6-9e617193d0ff.json and https://artists.proofprofile.net/proofs/artist/3087bd89-d3db-41e5-adf6-9e617193d0ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Works for Cimbalom By Contemporary Hungarian Composers
Scarlatti / Chiesa / Bach / Paganini / Debussy / Lendvay: Works and Arrangements for Cimbalom
Czemiczky / Lendvay / Lang / Soproni / Sugar / Hollos / Madarasz: Contemporary Cimbalom Music
Dohnányi: Hungarian Festive Overture - The Veil of Pierette - Kókai: Rhapsody from Szek - Verbunkos Suite
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 0x70ec14d1c1ec6759598c751a5bc4070f0fc3c0e050e48124341fab5a8af53f5c. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/HUA253271610.