{
  "computed_at": "2026-06-10T22:56:54+00:00",
  "tournament_start": "2026-06-11",
  "n_scored": 0,
  "window": 10,
  "overall": null,
  "rolling": [],
  "per_matchday": [],
  "empty_state_message": "First scored match expected 2026-06-11.",
  "provenance": {
    "what": "Rolling calibration record for the model's 2026 World Cup match forecasts: the published probabilities scored against observed results.",
    "graded_forecast_rule": "Each match is graded against the earliest forecast logged at least 24 hours before kickoff, from an append-only prediction log. Later forecasts never replace an earlier row, so the graded number is settled the moment it is written.",
    "brier_score": "Sum of squared gaps between the published home/draw/away probabilities and the observed outcome. 0 is perfect, 2 is worst, and a uniform one-third guess scores 0.667 on every match.",
    "methodology_url": "https://onthepitch.now/docs/methodology/",
    "scoreboard_url": "https://onthepitch.now/docs/calibration/",
    "receipts_url": "https://onthepitch.now/precommitment_receipts.json",
    "frozen_record_url": "https://onthepitch.now/frozen_predictions.json"
  },
  "model_version": "1.0.0"
}