{
  "calibration_id": "calibration-demo-reference-001",
  "source_asset_ref": "asset://demo/reference-001",
  "observations": [
    {"property": "palette", "value": {"dominant": ["deep_navy", "warm_orange"], "accent": "blue"}, "provenance": "DERIVED", "confidence": 0.82, "evidence_ref": "evidence://color/001"},
    {"property": "density", "value": "controlled_high", "provenance": "DERIVED", "confidence": 0.68, "evidence_ref": "evidence://whitespace/001"},
    {"property": "semantic_risk", "value": ["text_overlap", "face_occlusion_check_required"], "provenance": "UNKNOWN", "confidence": 0.32, "evidence_ref": "evidence://semantic/001"}
  ],
  "profile_update_proposal": {
    "status": "proposed",
    "changes": [{"path": "/derived_visual_profile/palette", "value": "deep_navy_warm_orange"}, {"path": "/semantic_safety/face_occlusion_policy", "value": "block_without_review"}],
    "review_required": true
  },
  "mutation_allowed": false
}