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Check origin answers one question about a picture or a video you attach: does it look authentic, or does it carry the marks of generation or manipulation? It is an explicit ask on attached media — not something that runs silently on every image in a thread.

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Run a check

1

Attach the media

Choose + → Check origin on the composer, or attach the file with Attach file. iPhone HEIC/HEIF photos are accepted.
2

Ask

Is this photo authentic? or Was this generated? The turn runs the origin check on the attachment.
3

Wait for the verdict

Cortex holds its reply until a verdict paints. You will not get a confident paragraph followed by a result that contradicts it.

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When the check cannot run

If origin check is unavailable on a deployment, the product says so instead of guessing. That is fail-closed behaviour, not a broken button: no verdict is still no verdict. Ask again later rather than reading silence as a result.

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What it is not

Pictures generated with Cortex-Image-1 are ordinary Library files. If you want to know whether one of them reads as generated, attach it and ask — the check does not run on its own after generation.

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Sizes and formats

An origin check runs on an attachment, so the same upload limits apply as anywhere else in Chat and Library. A file that was rejected at upload is never attached, so there is nothing for the check to read — attach a supported file or a smaller one. See payload_too_large for the ceilings and Library for the failure states.

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