Verify a report

Someone showed you an Opponentura Opponentura report? Enter its number and attach the file — we will check it against our register and tell you whether it is the same document and whether it was altered.

Report number
The report file — PDF

The file is never uploaded: its hash is computed right in your browser and only the hash is sent to us. This is the only way to catch an altered text. The report is issued as a single PDF and have no other form. If you hold a reading copy we issued before 2 August 2026, we will recognize it too — and say plainly that it is a copy.

I only have a paper copy — check by the seal

SHA-256 from the seal (first 8 characters are enough)

A weak check. It only confirms that such a seal was issued: whoever edits the document leaves the seal string untouched and changes the words around it. A paper copy cannot prove the text — ask the document holder for the original file.

What stays with us after your check: the file digest and the report number in a request log — you give us no name and no contact. Details — in the privacy policy.

How this works

A hash printed inside a document proves nothing on its own: it lives in the document and survives any edit of the text. Proof appears when the hash is recomputed from the file and compared with an independent record. At issue time we store the hashes of the files the client received; this page compares your file against them. Change a single character and the hash differs — the check fails.

What we do NOT show

No case content, no verdict, no client — only “matches” or “does not match”, plus the issue date. Protocols belong to their clients, not to us.

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