Check our record
Every graded prediction, fingerprinted before kickoff
Short version: before each game kicks off, SlipTip publishes a fingerprint of its predictions. After the game, it publishes the predictions themselves. If a single number had been changed afterwards, the fingerprint wouldn't match. So nobody, including us, can quietly edit a miss.
How it works
A fingerprint (a SHA-256 hash) is a short code worked out from a file. The same file always gives the same code, any change gives a completely different one, and the code can't be turned back into the file. So publishing it before kickoff gives nothing away, but locks the predictions in.
Each fingerprint also gets an OpenTimestamps proof, which ties it to the Bitcoin blockchain through independent servers. That proves when it existed without anyone having to trust our dates, or GitHub's.
The public repository link appears here once publishing is switched on.
Recent batches
| Batch | League | Games | First kickoff | Fingerprint | Fingerprint published | Predictions |
|---|---|---|---|---|---|---|
| 8 | Championship | 457 | 09 Oct 2026, 19:00 UTC | 1c244f32d3979c78 | - | after the games |
| 7 | League Two | 444 | 10 Oct 2026, 11:30 UTC | f8f3836a724de20c | - | after the games |
| 6 | League One | 453 | 10 Oct 2026, 11:30 UTC | a7a9476c009dcd6c | - | after the games |
| 5 | Ligue 1 | 290 | 09 Oct 2026, 18:45 UTC | d8bda8688044d7f0 | - | after the games |
| 4 | Serie A | 344 | 10 Oct 2026, 13:00 UTC | fa3dbe8038b7068d | - | after the games |
| 3 | Bundesliga | 277 | 09 Oct 2026, 18:30 UTC | 663d1862c87750fb | - | after the games |
| 2 | La Liga | 311 | 09 Oct 2026, 19:00 UTC | b1d09083aab7b140 | - | after the games |
| 1 | Premier League | 330 | 10 Oct 2026, 11:30 UTC | f2154d424ce87b0c | - | after the games |
Check one yourself
Download a batch file and its .sha256 file from the repository, then on a Mac run:
shasum -a 256 batch-000001.json
The code it prints must match the first line of batch-000001.sha256, which was published before
kickoff. The repository's README covers the OpenTimestamps check too.
Predictions graded before the ledger started are still in the app's Results tab, but they weren't fingerprinted, so they can't be checked this way.