Required public receipt
| Field | Why it matters |
|---|---|
| Timestamp | Proves when the forecast existed |
| Cutoff | Binds the information horizon |
| Model / version | Makes the producing system identifiable |
| Input receipt | Binds the frozen evidence |
| Abstention state | Prevents selective omission |
| Settlement status | Separates unresolved from scored events |
Evaluation
Brier score
Probability error reported by sport and evaluation period.
Log loss
Confidence-sensitive error with stated clipping policy.
Calibration
Forecast probability compared with observed frequency.
Source health
Availability, freshness, and failure state of required evidence.