Predictions are cheap. Receipts aren't.
Brier.
Forecasting, scored honestly.
A hash-chained, append-only record of sports predictions — timestamped before the event, graded against the close, and independently verifiable by anyone.
0 predictions graded so far — every one of them, win or lose, still sitting in the record below.
The record
Live, graded, and public. Not a highlight reel.
| Matchup | Line | Side | Verdict | Edge | CLV | Brier |
|---|---|---|---|---|---|---|
| Sean BurkeChicago White Sox vs Houston Astros · 2026-07-25 13:07 UTC | K 5.5 | O | WIN | +1.0% | -12.5¢ | 0.1521 |
| Paul SkenesPittsburgh Pirates vs Chicago Cubs · 2026-07-25 13:07 UTC | K 5.5 | U | LOSS | +1.0% | -23.5¢ | 0.2704 |
| Brandon YoungBaltimore Orioles vs Atlanta Braves · 2026-07-25 13:07 UTC | K 4.5 | O | WIN | +1.0% | -23.5¢ | 0.1225 |
| Michael WachaKansas City Royals vs Detroit Tigers · 2026-07-25 13:07 UTC | K 5.5 | O | LOSS | +1.0% | -24.0¢ | 0.3721 |
| Mitch BrattArizona Diamondbacks vs Washington Nationals · 2026-07-25 13:07 UTC | K 4.5 | U | WIN | +1.0% | -17.5¢ | 0.0036 |
Method
Three steps, in order. Skipping any one of them breaks the record.
A model produces a probability and a stake size before an event starts. Nothing here is a human's after-the-fact opinion.
The prediction is signed, hashed, and chained to the row before it, then timestamped — before the event, not after.
Once the event ends and a verifiable market close exists, the prediction is graded against it. No close, no grade.
Markets
What's covered today — expanded only as the model earns it.
Pricing
The record is free. We charge for what's still actionable.
Vs. the alternatives
Everyone who's ever been right once has a screenshot. Here's what's actually different about the record.
| A tout's Twitter feed | Your own spreadsheet | Brier | |
|---|---|---|---|
| Timestamped before the event | ✕ no | ~ sometimes | ✓ yes |
| Losses stay visible | ✕ no | ~ sometimes | ✓ yes |
| Append-only — can't be edited later | ✕ no | ✕ no | ✓ yes |
| Independently verifiable by anyone | ✕ no | ✕ no | ✓ yes |
| Graded against a real market close | ✕ no | ~ sometimes | ✓ yes |
FAQ
No. The predictions table is append-only at the database level — the server itself has no UPDATE or DELETE privilege on it, regardless of who's asking.
It's marked ungraded and stays out of the public record. Brier doesn't grade on an assumption.
Grading is only as honest as the closing-line data behind it. One market, done right, beats several done loosely.