{
  "history_start": "2026-09-27",
  "last_update": "2026-09-27",
  "note": "OWM records observed changes from this date onward and does not reconstruct changes that were not observed.",
  "changes": [
    {
      "date": "2026-09-27",
      "type": "passport-expansion",
      "summary": "OWM Model Passport expanded to 20 exact model/checkpoint records."
    },
    {
      "date": "2026-09-27",
      "type": "third-party-runtime-evidence",
      "summary": "Four externally measured runtime records added with explicit provenance and no claim of OWM reproduction."
    }
  ]
}