{
  "testedAt": "2026-10-22",
  "sourceType": "Synthetic fixtures; not actual ComfyUI, ChatGPT or camera exports.",
  "method": "Processed by this repository's scanImage, cleanImage and verifyClean. Encoded image payload SHA-256 and Chromium-decoded RGBA SHA-256 compared before and after. The whole-file hash is expected to change.",
  "limitations": "Four small constructed files only. This is not generator coverage, a benchmark, a C2PA signature test or proof of all-file compatibility. The oversized-text sample deliberately retains unresolved data.",
  "samples": [
    {
      "id": "workflow-png",
      "title": "Static PNG with workflow and prompt fields",
      "synthetic": true,
      "format": "png",
      "original": "/samples/metadata-evidence/workflow-png-original.png",
      "cleaned": "/samples/metadata-evidence/workflow-png-cleaned.png",
      "policy": {
        "mode": "ai_workflow",
        "removeC2pa": false,
        "removeColorProfile": false
      },
      "width": 32,
      "height": 24,
      "inputBytes": 2137,
      "outputBytes": 1997,
      "needsReview": false,
      "fields": [
        {
          "label": "AI generation parameters",
          "before": "found",
          "after": "removed",
          "key": "workflow"
        },
        {
          "label": "AI generation parameters",
          "before": "found",
          "after": "removed",
          "key": "prompt"
        },
        {
          "label": "Creator or copyright",
          "before": "found",
          "after": "preserved",
          "key": "Copyright"
        }
      ],
      "encodedPayloadPreserved": true,
      "transparencyPreserved": true,
      "orientationPreserved": null,
      "payloadSha256": {
        "before": "db88fd9c928e29c2f03cb07cb65314e8e16cf703844311b900b88c6ebdaa183f",
        "after": "db88fd9c928e29c2f03cb07cb65314e8e16cf703844311b900b88c6ebdaa183f"
      },
      "decodedRgbaSha256": {
        "before": "3a71fbe816ad6458575c382732e30287cf5a7083cee6ca07b801d4b395006fa0",
        "after": "3a71fbe816ad6458575c382732e30287cf5a7083cee6ca07b801d4b395006fa0"
      }
    },
    {
      "id": "transparent-png",
      "title": "Transparent PNG with compressed generation parameters",
      "synthetic": true,
      "format": "png",
      "original": "/samples/metadata-evidence/transparent-png-original.png",
      "cleaned": "/samples/metadata-evidence/transparent-png-cleaned.png",
      "policy": {
        "mode": "publish",
        "removeC2pa": true,
        "removeColorProfile": false
      },
      "width": 32,
      "height": 24,
      "inputBytes": 2065,
      "outputBytes": 1997,
      "needsReview": false,
      "fields": [
        {
          "label": "AI generation parameters",
          "before": "found",
          "after": "removed",
          "key": "parameters"
        },
        {
          "label": "Creator or copyright",
          "before": "found",
          "after": "preserved",
          "key": "Copyright"
        }
      ],
      "encodedPayloadPreserved": true,
      "transparencyPreserved": true,
      "orientationPreserved": null,
      "payloadSha256": {
        "before": "db88fd9c928e29c2f03cb07cb65314e8e16cf703844311b900b88c6ebdaa183f",
        "after": "db88fd9c928e29c2f03cb07cb65314e8e16cf703844311b900b88c6ebdaa183f"
      },
      "decodedRgbaSha256": {
        "before": "3a71fbe816ad6458575c382732e30287cf5a7083cee6ca07b801d4b395006fa0",
        "after": "3a71fbe816ad6458575c382732e30287cf5a7083cee6ca07b801d4b395006fa0"
      }
    },
    {
      "id": "gps-jpeg",
      "title": "Browser-drawn JPEG with artificial GPS",
      "synthetic": true,
      "format": "jpeg",
      "original": "/samples/metadata-evidence/gps-jpeg-original.jpg",
      "cleaned": "/samples/metadata-evidence/gps-jpeg-cleaned.jpg",
      "policy": {
        "mode": "privacy",
        "removeC2pa": false,
        "removeColorProfile": false
      },
      "width": 32,
      "height": 24,
      "inputBytes": 1226,
      "outputBytes": 1226,
      "needsReview": false,
      "fields": [
        {
          "label": "GPS location",
          "before": "found",
          "after": "removed",
          "key": "EXIF GPS IFD"
        },
        {
          "label": "Color profile",
          "before": "found",
          "after": "preserved",
          "key": "APP2 ICC"
        }
      ],
      "encodedPayloadPreserved": true,
      "transparencyPreserved": null,
      "orientationPreserved": true,
      "payloadSha256": {
        "before": "8d4d296b9a9d44cd2bd26a09f5aab65f27dcb2632735e141eae072a21619a833",
        "after": "8d4d296b9a9d44cd2bd26a09f5aab65f27dcb2632735e141eae072a21619a833"
      },
      "decodedRgbaSha256": {
        "before": "876de8e95e07813325c4efcff2a2b49e4aec986760ab5c6c243f3d06d3864886",
        "after": "876de8e95e07813325c4efcff2a2b49e4aec986760ab5c6c243f3d06d3864886"
      }
    },
    {
      "id": "review-needed-png",
      "title": "PNG with text beyond the inspection limit",
      "synthetic": true,
      "format": "png",
      "original": "/samples/metadata-evidence/review-needed-png-original.png",
      "cleaned": "/samples/metadata-evidence/review-needed-png-cleaned.png",
      "policy": {
        "mode": "publish",
        "removeC2pa": true,
        "removeColorProfile": false
      },
      "width": 32,
      "height": 24,
      "inputBytes": 3107,
      "outputBytes": 3061,
      "needsReview": true,
      "fields": [
        {
          "label": "AI generation parameters",
          "before": "found",
          "after": "removed",
          "key": "parameters"
        },
        {
          "label": "Unreadable text metadata",
          "before": "found",
          "after": "unsupported",
          "key": "zTXt"
        },
        {
          "label": "Creator or copyright",
          "before": "found",
          "after": "preserved",
          "key": "Copyright"
        }
      ],
      "encodedPayloadPreserved": true,
      "transparencyPreserved": true,
      "orientationPreserved": null,
      "payloadSha256": {
        "before": "db88fd9c928e29c2f03cb07cb65314e8e16cf703844311b900b88c6ebdaa183f",
        "after": "db88fd9c928e29c2f03cb07cb65314e8e16cf703844311b900b88c6ebdaa183f"
      },
      "decodedRgbaSha256": {
        "before": "3a71fbe816ad6458575c382732e30287cf5a7083cee6ca07b801d4b395006fa0",
        "after": "3a71fbe816ad6458575c382732e30287cf5a7083cee6ca07b801d4b395006fa0"
      }
    }
  ]
}