Digital BW, The Print

Jack M Kucy writes:

> Let's not waste the space. The image has to be recognizable. If it is 25
> kB JPG it's still fine. How many of them can you fit on a single CD-R?
> More than 26000 images. You do the batch registering - that's it.

What happens if the images are grossly similar to other images taken by
other photographers?  With low-resolution images, how do you proof that
a given image used by someone else is yours, and not his or that of some
other photographer?