Verify a sealed document
Paste a sealed export below. This confirms whether the document is byte-identical to the one issued by Blackout Intelligence, and identifies which findings changed if any have. No account, no sign-in — anyone holding the file can check it.
What a valid seal proves
That the findings, their confidence values, their order and any withheld values are exactly as issued, at the time stated. Each finding carries its own hash, so a single altered value is located precisely rather than invalidating the whole file.
What it does not prove
That the underlying information is correct. Integrity and accuracy are different questions. A sealed document faithfully reproduces what the sources said at collection time; assessing whether those sources were right remains the analyst’s job — which is why every finding in a Blackout report carries its own source grading.
Why not just a checksum
Because an unkeyed hash protects against accidents, not against people. Anyone who edits a document can recompute its checksum. These seals are signed with a key held only on our servers, so a recipient can verify a document but cannot forge one.
Programmatic use
POST /api/verify with { seal, cards } taken straight from the export. Unauthenticated, same result.