Last night someone lowered the ventilation in house 3 remotely and the birds overheated.
The Harborlight witness recorded it. Now try to change what the record says.
This runs the witness's own verification code in your browser. Nothing is sent anywhere.
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The log
Why it's caught
Every entry is hashed, pairs of hashes are hashed together, up to one root. The witness signs
that root. Change any entry and every hash above it changes too (red), so the root no longer matches.