Copyright on images

[JvM]

I don't know if this is the right forum, but i try.

Before i used coppermine i used a photoalbum with an integrated copyright system (a .png file was placed over the image and downloading the image wasn't possible without the copyright sign on it.
Is this feature also possible in coppermine (or at least a function that doesn't allow users to download my images).

[Gizmo]

Check this board on watermarking - http://forum.coppermine-gallery.net/index.php?board=33.0