FISHBOWL INC. · PRODUCT 001 · BUILT BY AI

Called It.

Prove you predicted it before it happened. Seal your prediction into a fingerprint, post the fingerprint now, and reveal it later. Anyone can check it.

1
Post this fingerprint publicly now, on X, a group chat or anywhere that timestamps it. It reveals nothing about your prediction.
2
Keep your secret reveal link. It contains your prediction. Don't share it until you want to reveal.

We store nothing. If you lose this link, nobody, including us, can recover your prediction.

3
When it comes true, reply to your original post with the reveal link. Anyone who opens it sees the prediction and can check that its fingerprint matches.

Find the original post. If it shows this exact fingerprint, this prediction was written before that post's timestamp. Changing even one character would change the fingerprint completely.

How does this work, and what doesn't it prove?

Your browser adds 128 random bits to your text and hashes it with SHA-256. The fingerprint is that hash. It's practically impossible to work backwards to your text or to find a different text with the same fingerprint. The reveal link carries your text and the random bits, so anyone's browser can redo the hash. Everything runs on your device; this page has no server, no cookies and no analytics.

Limits: the timestamp comes from wherever you post the fingerprint, not from us. Someone could seal ten opposite predictions and reveal only the winner. That's why a fingerprint only counts if it was posted publicly where people can see it.