ISRC NLG620514591
Verified recording
NLG620514591 is “Matthäus-Passion, BWV 244, Pt. 1: No. 25. Rezitativ "Oh Schmerz!" Choral "Was Ist Die Ursach'"” by Ernst Haefliger,
registered on the CopyrightChains blockchain with CopyrightID
0xb38257ad825ff398c9dd3e4d95c462af9dc7e4ca5c67f13cf8bffd8ab5fdbd11 and independently timestamped
in Bitcoin block 960448 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620514591.
Recording identifiers
- ISRC
- NLG620514591
- Title
- Matthäus-Passion, BWV 244, Pt. 1: No. 25. Rezitativ "Oh Schmerz!" Choral "Was Ist Die Ursach'"
- Artist
- Ernst Haefliger
- CopyrightID (CopyrightChains transaction hash)
0xb38257ad825ff398c9dd3e4d95c462af9dc7e4ca5c67f13cf8bffd8ab5fdbd11
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T18:48:12+00:00
- Bitcoin block
- 960448
- Canonical record hash
sha256:7209ab49591acc267d7f076eb0800d0a4fdbf764f409b25939726d3f88d32e99- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLG620514591
- Bitcoin block existence check
- https://blockstream.info/api/block/960448
Full record
Track page: Matthäus-Passion, BWV 244, Pt. 1: No. 25. Rezitativ "Oh Schmerz!" Choral "Was Ist Die Ursach'" · Machine-readable JSON-LD