Pre‑registration (Prereg)

Write your rules or predictions before you test them. We convert your text into a SHA‑256 fingerprint so anyone can verify you didn't change it later.

  1. Write the plan: fixed rules, inputs, targets, any excluded choices.
  2. Hash it here to get a SHA‑256 value.
  3. Publish the hash (e.g., post it, or add it to your site) with a date.
  4. Reveal the prereg text later; others can recompute the hash and match it.
Tip: keep the text immutable. If you need to change anything, create a new prereg with a new hash.