Stripped copies to test
Each picture below is a copy of the corpus photo trusted-photo.jpg, signed by Robert Angelo and listed in the Reconize registry. None of them carries Content Credentials. The first had its public hidden mark removed too; some of the others still carry it, because the public mark survives re-saving and resizing, so the extension may also report a hidden mark for them. The registry lookup does not use the mark. They are here so anyone can check that a stripped copy still leads back to who signed it.
How to test
With the browser extension (1.0.4 or later): hover a picture, click the Reconize chip, then Look it up. Without it: download a picture and drop it on reconize.me/verify; the lookup runs on its own when there are no credentials. Either way only a fingerprint of the picture is sent, never the picture.
What this does not show
A match here comes from a Reconize record of what the signed picture looks like, not from anything left inside the copy. It says who listed a picture that looks the same, which is not proof of who made it. Heavy edits can still escape: squeezing to about half the width and cropping, keeping only a quarter of the picture, or repainting it. The full list is under Known limits on the corpus page.