Verify a prediction

(i) Where to find a prediction's hash

Every day's predictions are anchored in our public attestation ledger at github.com/eifok/themorningslate-attestations. Each file contains the SHA-256 hash for every prediction published on that date.

(ii) What an attestation entry looks like

{
  "id": "cm1dee88bcb264b3b4f06719ab",
  "hash": "59c5949ca01c8faf60a24f1bcd382de28aab1c60b9ef5715f36346400fd653da",
  "predictionSchemaVersion": "betclarity-prediction-v2",
  "publishedAt": "2026-05-29T03:00:03.584Z"
}

Each entry's `hash` is the SHA-256 of the prediction's canonical content. Paste the `id` into the form below and we'll fetch that prediction's canonical fields and recompute its hash in your browser.

Note: this is the attestation entry summary, not the prediction's full canonical payload. To verify a prediction, enter its `id` in the form below — we'll fetch the canonical payload for you. The Advanced form further down expects the canonical payload's shape, not this entry's shape.

(iii) Verifying a single prediction

Paste the prediction's `id` into the form below. We'll fetch the prediction's canonical fields from our public dataset (a server lookup) and recompute the SHA-256 hash in your browser (the math runs locally). If our recomputed hash matches the one in the attestation file, the prediction's content is unchanged since publication.

(iv) Verifying a full day's rootHash (no The Morning Slate trust required)

Or skip the per-prediction step and verify the entire day's `rootHash` directly. Copy every `hash` value from an attestation file (one per line) into the command below and run it in any shell with `sha256sum`:

# Replace the hashes below with the ones from your attestation file
# (one per line, in any order — the script sorts them):
echo -n "0ddadf492b6ea9f9126c98abe2397f5718d39c6cb426dcbc075593d24f338bb0
13f42734e540b8a61551698f114402c0e3d331d51bb85663e02c5cea35a4515e
# ... paste all of the day's prediction hashes here, one per line ...
" | sort | tr -d '\n' | sha256sum

This computes the `rootHash` of an entire day's predictions using only standard Unix tools. If the output matches the `rootHash` field in the attestation file, every prediction in that day is anchored as expected — no The Morning Slate server, code, or library required.