The public transparency log
Every end-of-route safety sweep issues a tamper-evident certificate. Their hashes form an append-only chain, anchored by a signed Merkle root published here. You don't have to trust us — you can verify.
Current signed root
Verify a certificate
Paste a certificate hash (from the school dashboard or a CSV export). Your browser recomputes the proof itself — our server's answer is never the thing you trust.
Every sweep certificate is hash-chained to the one before it, so history cannot be quietly rewritten.
We publish a Merkle root over the whole chain, signed with a key whose public half is shown above. Archive successive roots — any rewrite betrays itself.
The proof check runs in your own browser with open math. No certificate contains a location — the log anchors safety, not movements.