EBAY has this program for studios called VERO - Verified Rights Owner.

After signing up, it gives you a fast track to reporting Piracy, gives you a method to contact the Seller without being "blocked", and allows you to upload your catalog, so that sellers of your USED DVDs need to list it/them according to your descriptions - not theirs!

Took almost 2 weeks to work through this, but it is now in place.