thumb|Johannes Bernardus van Bree Johannes Bernardus van Bree (29 January 1801 – 14 February 1857) was a Dutch composer, violinist and conductor. Van Bree was born and died in Amsterdam. He was a pu
Andante Con Variationi, On W.A. Mozarts 'Ein Mädchen Oder Weibchen', Op. 2
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1be5d25a24cdb9299b746d59da7335d3e0a6f991caff7c98f5232faa44d0d1f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL3UC2000654 — a six-check JSON result.
Van Bree: Violin Concerto, Fantasy & Overtures
Allegro for 4 String Quartets in D Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d6461bf41877a51a0240136db8c4ac88447935d309116486a2d61b4fd25852. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMG1540933 — a six-check JSON result.
Dutch Overtures: Van Bree, Verhulst, Wagenaar, Van Gilse