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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 10 Nov 2026

  1. Tavernes – Valencia update 5 sealed Tue 10 Nov 19:10 · kick-off Tue 10 Nov 21:00
    80eb3fe52d19f94e6caaf501726a2d06bdbb65d0df64e72a9d78b19a3a04d6cb
    Show content and check 
    {"scheme":1,"prediction_id":152,"fixture_id":3893,"version":5,"competition":"Copa del Rey","home":"Tavernes","away":"Valencia CF","kickoff_utc":"2026-11-10 20:00:00","pick_1x2":"2","prob_home":7.2,"prob_draw":16.7,"prob_away":76.1,"prob_over25":50.0,"prob_btts":38.0,"confidence":"medium","sealed_at_utc":"2026-11-10 18:10:29","nonce":"ceb57f2302bd128d4d71cd1b6c9d411d"}

    Previous fingerprint in the chain: 426142a24fa56919d4b34f2225e1a8285bad81af50d8f6276c5970a66fdb79e5

  2. Navalcarnero – Real Betis sealed Tue 10 Nov 08:51 · kick-off Thu 12 Nov 19:00
    426142a24fa56919d4b34f2225e1a8285bad81af50d8f6276c5970a66fdb79e5

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

  3. Tarancón – Levante sealed Tue 10 Nov 08:50 · kick-off Thu 12 Nov 19:00
    eed4110986c18e3e5bd5e134a84d2c665b7d52cd7a5396a3e9560e93cbc655ff

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

  4. Calvo Sotelo – Albacete sealed Tue 10 Nov 08:50 · kick-off Thu 12 Nov 18:30
    aa63eee0adecf700932c265b2b34bb78fa651c9019b2a111dc55f800f0c586c8

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

  5. Mijas – Real Jaén update 2 sealed Tue 10 Nov 06:20 · kick-off Tue 10 Nov 20:00
    2b8276920188e9180a76de4c231ed6ed5477c546fc4644da1c7e684977732c58
    Show content and check 
    {"scheme":1,"prediction_id":148,"fixture_id":3892,"version":2,"competition":"Copa del Rey","home":"Mijas Las Lagunas","away":"Real Jaén","kickoff_utc":"2026-11-10 19:00:00","pick_1x2":"1","prob_home":76.3,"prob_draw":14.7,"prob_away":9.0,"prob_over25":63.0,"prob_btts":50.0,"confidence":"low","sealed_at_utc":"2026-11-10 05:20:17","nonce":"724ede701641418e43165d7566794091"}

    Previous fingerprint in the chain: 124449fa621726334a5794c8ef95d55a2fdee3aca530f1a17e48ca7c0c2d5a3e

  6. Tavernes – Valencia update 4 sealed Tue 10 Nov 02:04 · kick-off Tue 10 Nov 21:00
    124449fa621726334a5794c8ef95d55a2fdee3aca530f1a17e48ca7c0c2d5a3e
    Show content and check 
    {"scheme":1,"prediction_id":147,"fixture_id":3893,"version":4,"competition":"Copa del Rey","home":"Tavernes","away":"Valencia CF","kickoff_utc":"2026-11-10 20:00:00","pick_1x2":"2","prob_home":8.2,"prob_draw":16.6,"prob_away":75.2,"prob_over25":52.0,"prob_btts":40.0,"confidence":"medium","sealed_at_utc":"2026-11-10 01:04:13","nonce":"e2b14128d14c45f17ae7f40248e5548e"}

    Previous fingerprint in the chain: 3c4aab33212382b686355388f7197fc76ceff093853832e02cbe64f21f6349aa

Also as JSON: /api/v1/seals?date=2026-11-10

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