Jacob Regnart (French: Jacques Regnart; 1540s – 16 October 1599) was a Flemish Renaissance composer. He spent most of his career in Austria and Bohemia, where he wrote both sacred and secular music.
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 0x40f201fe883eeddc6906e05e75de6a256f7e8549c4ce58c0684ff80139c20bfa. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a876c01-8cb2-4724-a7e2-7269efb54677.json and https://artists.proofprofile.net/proofs/artist/4a876c01-8cb2-4724-a7e2-7269efb54677.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Regnart: Missa super Oeniades Nymphae & Other Sacred Music
Jacob Regnart: Stimmwerck (Renaissance Series, Arr. for Guitar)
Regnart: Missa Christ ist erstanden & Other Works
Glad dig du Kristi brud (O Bride of Christ, Rejoice) [arr. G. Idenstam]
Christmas Folkjul - A Swedish Folk Christmas
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 0x3ce2fa97987d392a5ac24afd10eadf9d76b6212666bf53c8d5ea478e1ac43838. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEAEU0731060.