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Verifiable transparency

Sealed predictions

Anyone can claim they got it right. We prove it: every prediction is sealed before kick-off and cannot be changed afterwards without it showing.

1We seal before kick-off

When a prediction is published we compute its digital fingerprint (SHA-256) from the probabilities, the pick and the time.

2The fingerprint goes public instantly

The fingerprint appears here from that moment. The content is revealed when the match starts.

3You check it

Press “Check”: your browser recomputes the fingerprint. If anyone had changed a number, it would not match.

108sealed predictions
26.2hbefore kick-off on average
100%of settled predictions are sealed
✓chain intact (108 seals)

87 of 87 predictions settled since we started sealing have a fingerprint from before kick-off.

Seals on 11 Nov 2026

  1. Salamanca UDS – Celta sealed Wed 11 Nov 08:40 · kick-off Fri 13 Nov 21:00
    3c6ee5b25828a31d6444e574871c505aba6ab0b5447e3cb597a722ec7515f521

    🔒 The content is revealed when the match starts. The fingerprint is already public.

  2. Leganes – Burgos sealed Wed 11 Nov 08:40 · kick-off Fri 13 Nov 20:30
    571489cd4b7b20c577b36a120e3019db021b723ec40ed684db56bf7e23c001dc

    🔒 The content is revealed when the match starts. The fingerprint is already public.

Also as JSON: /api/v1/seals?date=2026-11-11

Daily anchors

Every day we post the chain's latest fingerprint on our Telegram channel. Telegram fixes the date, so not even we could rewrite the history.

Bitcoin witness (OpenTimestamps)

Besides Telegram, every daily fingerprint is recorded on the Bitcoin blockchain with OpenTimestamps, a free and open standard. Not even we can change the date: a Bitcoin block sets it.

Latest confirmed day: 10 Nov 2026 · Bitcoin block 975.362 (Wed 11 Nov).

To check it without trusting us, download a day's .txt and .ots files and drop them on opentimestamps.org · ots verify AAAA-MM-DD-pronoslab.txt.ots

Check it without our site

  1. Copy the previous fingerprint and the content exactly as shown, with no extra spaces.
  2. Compute the SHA-256 of the previous fingerprint followed by the content (any tool or the terminal will do).
  3. If the result equals the published fingerprint, the prediction is exactly the one sealed before kick-off.
printf '%s' "$PREV$PAYLOAD" | sha256sum