QsoCheck source, German copy and interface: original independent implementation. Internal common.js/events.js are project-owned. No third-party runtime library, font, proprietary HRD code, graphics, callsign dataset or ADIF enumerations were copied.

Format implemented independently from public ADIF3.1.7 https://www.adif.org/317/ADIF_317.htm; the original specification remains with its authors. No claim of complete ADIF semantic compliance, official certification, station authenticity or award eligibility.

Build-only dependency Vite8.3.2 MIT and transitive dependencies retain their own licenses. package-lock pins official registry references.