{
  "schema_version": "navonavo.public-image-measurement.v1",
  "evidence_id": "wsrv-png-public-trial-20261031",
  "supplier": "wsrv.nl",
  "official_entry": "https://wsrv.nl/",
  "observed_at": "2026-10-31T16:39:50.2455267+00:00",
  "scope": "Actual public supplier HTTPS processing of self-generated synthetic pixels; not independent external adoption or a Node connection.",
  "input": {
    "media_type": "image/png",
    "width": 64,
    "height": 32,
    "bytes": 180,
    "sha256": "80e728d48f391faa2ef1cfa521f961494a7f83137678c04ba31bd56a22a85686",
    "content": "Generated opaque RGB quadrants, corner markers and central black marker. No user image or personal data."
  },
  "results": [
    {
      "id": "contain-png",
      "http_status": 200,
      "format": "PNG",
      "width": 32,
      "height": 32,
      "bytes": 390,
      "sha256": "376b0c0a78a764a4f579d513ea9a7ac441126817517796988b4cb87084914ad4"
    },
    {
      "id": "cover-jpeg",
      "http_status": 200,
      "format": "JPEG",
      "width": 32,
      "height": 32,
      "bytes": 576,
      "sha256": "f9f3c77646924c29c11cc7c04aead79fa5dc901a119c32c4c45f56c52c0533f6"
    },
    {
      "id": "fill-png-from-png",
      "http_status": 200,
      "format": "PNG",
      "width": 24,
      "height": 16,
      "bytes": 342,
      "sha256": "6ede8863df86f92835a8c7adecb242fdedaa9b1e5e07db60cb845e36b94d9593"
    },
    {
      "id": "without-enlarge",
      "http_status": 200,
      "format": "PNG",
      "width": 64,
      "height": 32,
      "bytes": 182,
      "sha256": "d5adeb4576216724dcc8ad7228df2128689ebd1996814bc9349d47e76da5f38f"
    },
    {
      "id": "repeat-contain-png",
      "http_status": 200,
      "format": "PNG",
      "width": 32,
      "height": 32,
      "bytes": 390,
      "sha256": "376b0c0a78a764a4f579d513ea9a7ac441126817517796988b4cb87084914ad4"
    }
  ],
  "geometry_checks": {
    "contain_white_padding_each_side_rows": 8,
    "contain_interior_quadrants_verified": true,
    "cover_central_crop_verified": true,
    "cover_jpeg_mean_channel_error_in_sample": 0.748,
    "fill_dimensions": [
      24,
      16
    ],
    "fill_quadrants_and_corner_markers_preserved": true,
    "without_enlarge_output_pixels_equal_source": true,
    "repeat_bytes_and_pixels_equal_in_one_observation": true
  },
  "conditions": {
    "input_must_be_public_url": true,
    "third_party_processing_and_caching_must_be_allowed": true,
    "zero_retention_guarantee": false,
    "local_only_supported": false,
    "authentication_used": false,
    "account_or_paid_api_used": false,
    "service_guarantee": "Best effort; no SLA."
  },
  "unverified": [
    "JPEG input and JPEG-to-PNG",
    "Transparency",
    "ICC/color management",
    "EXIF rotation",
    "Large files and general size limits",
    "Long-term availability",
    "All clients and networks",
    "GW07 local HTTP POST node",
    "GA05b independent adoption"
  ],
  "measurement_limits": [
    "No-enlargement64x32 is not a128x128 fixed-canvas result.",
    "One repeated result is not an availability or determinism guarantee.",
    "Direct API fee was not charged; other operating costs remain unknown."
  ],
  "official_sources": [
    "https://wsrv.nl/docs/",
    "https://wsrv.nl/docs/fit",
    "https://wsrv.nl/docs/format",
    "https://wsrv.nl/faq/"
  ]
}