Ok, I have to be honest here. I do not see this alleged copyright info in the file. Following the instructions you provided, I see no signature at all using Acrobat reader 8 and 9 and using the full Acrobat professional 7 and 8. So unless you can give us crystal clear instructions on seeing this copyright information, stop trying to claim this is copyrighted. A simple screen shot with how you got it will be sufficient, but it my be reproducible by anyone else, not by only your method.
Several people have tried to see this alleged electronic signature, and no one but you have been able to see it. Prove it, or drop it.