Comparative Forensic Technical Note: Pre-Existing Binary Footprint in Peru (Lima) Electoral Records (July 30, 2026) and Secondary Software Compilation Analysis

Open-science comparative technical note documenting pre-existing binary and structural anomalies captured and cryptographically sealed on July 29–30, 2026 (ISO-8601 filesystem timestamps and SHA-256 hashes verified more than three months prior to the November 2026 public media revelations regarding parallel vote-counting software in Peru). Conducted from an independent citizen-science perspective using standard open-source forensic utilities (QPDF, ExifTool, Poppler pdfimages, ZBar, ImageMagick, and sha256sum), the July 30, 2026 audit of the Lima, Peru consular electoral sample (25 out of 25 official PDF records; 100.0% anomaly rate) identified: (1) Complete purge of origin scanner EXIF metadata (Creator, Producer, CreateDate); (2) Multi-layer image composition (/XObject overlays and 1-bit /DeviceGray synthetic masks with zero standard deviation); (3) Cross-reference table syntactic scars (Delta XREF +2); and (4) Secondary QR stream injection. These findings corroborate a unified secondary software compilation pipeline across regional electoral digitization infrastructure.