I have a 9 week old pedigree boxer pup bred from top bloodlines, how do i know if he is show quality?

Your reputable show breeder would have told you. Since he/she didn't, the pup is more than likely pet quality. Bloodlines are nothing more than a family tree. If you look at a pedigree and see that one of the Grand-sires or Grandams was in the top 20 in the country, it means NOTHING. Have your pup evaluated by someone who shows actively and is a member of the Boxer Club of America.