{
  "version": "2026-10-02-v1",
  "canonicalOwner": {
    "siteId": "coloringpages-b2f2f65e",
    "domain": "coloringpages.tools"
  },
  "evidenceThesis": "For the disclosed 24 locally reviewed ColoringPages dragon illustrations, paired A4 and Letter vector PDFs preserve the illustration-canvas proportions while yielding different physical artwork sizes; document geometry can be preflighted separately from printer behavior.",
  "claims": [
    {
      "id": "canvas-geometry",
      "statement": "In this frozen 48-file local cohort, all files are one-page vector PDFs with no raster Image objects, expected A4 or Letter page dimensions, and approximately 36-point minimum canvas margins.",
      "anchor": "pdf-geometry-results",
      "evidence": [
        "dataset.json",
        "results.json",
        "print-samples.zip"
      ],
      "method": "Decode the actual PDF content streams; inspect MediaBox, artwork transform, indirect image objects and canvas proportions; use 0.01-point page-size and margin tolerances.",
      "limits": "Canvas bounds, not tight ink bounds. No guarantee for a particular printer, physical output or every current library asset."
    },
    {
      "id": "paper-size-comparison",
      "statement": "For this disclosed portrait 3:4 cohort, the Letter artwork canvas is approximately 3.20% wider than the A4 artwork canvas under the exporter\u2019s fixed margin rule.",
      "anchor": "a4-versus-letter",
      "evidence": [
        "dataset.json",
        "results.json"
      ],
      "method": "Compare paired artwork-canvas widths decoded from each actual PDF transform; ratio 1.0319525533.",
      "limits": "This result is confined to the disclosed 3:4 geometry, margin rule and page orientation. It is not a universal A4/Letter scaling ratio."
    }
  ],
  "limits": [
    "A single locally reviewed 24-illustration dragon cohort, not a random or representative sample.",
    "Publication and current Production byte equality have not been asserted.",
    "PDF canvas margins differ from minimum margins of the actual dark ink.",
    "No physical printer, paper-weight, ink-use, child-development or therapy experiment.",
    "Artwork is vectorized from original raster line art; vector storage is not proof of recovered detail or visual quality."
  ],
  "independentReaderValue": "Provides worked examples, disclosed calculation/structural criteria, actual original results and downloadable inputs without requiring a product purchase or an external citation.",
  "reproduction": {
    "command": "python3 reproduce.py",
    "scope": "Recalculates public dataset summaries and verifies all archived PDF hashes; independent PDF object parsing was performed locally at measurement time. Not a printer test."
  }
}