Here are pictures of my US Harry Potter proofs:
Harry Potter and the Sorcerer's Stone front:
back:
Harry Potter and the Chamber of Secrets front:
back:
Harry Potter and the Prisoner of Azkaban front:
back:
After these, Scholastic decided proofs were no longer needed for the following books.
I don't own any of the UK proofs of the Harry Potter books because they are just too expensive for me. I do keep looking for a deal, though.
John