Verify a record
A ProofMemo record carries its own seal. The reader checks that seal in your own browser, against a key we publish outside the file — so verification never depends on trusting us.
Change a single byte of the record and the seal fails, and says so. Nothing about the underlying client file is needed to check it, and nothing leaves your browser to do it.
Someone hand you a record to check? This is where that check happens. Drop the file on the reader; the seal is verified against a key published outside it, so a doctored copy cannot pass.