Content Credentials lost when image is downloaded from Behance

Uploaded some photos to Behance with Content Credentials and I can see the Edits and Activity listed out there, but if I download the image from Behance I get a new file + if I upload that to https://verify.contentauthenticity.org/inspect there are no longer Content Credentials attached. 

Anyone have more info on images retaining attribution details, content credentials, provenance, etc as they circulate (upload/download, screenshot, etc)? Is there some kind of digital watermarking method that could support this? 

Curious to hear any input - thanks