Yes in order to be single registered in UKC the dog must meet breed standards. The dog will be inspected by a inspector for both breed standards and trailing and treeing in the woods.
Each Breed club has their own requirements.
Take for example the B&T Breed club. After the Hard Rock incident, they changed their single registration requirements.
_________________
CoonDawgs.com - A Site Designed for Coon Hunters
American Houndsmen - Vintage Hound Hunting
Coon Dog Cemetery - Key Underwood Coon Dog Memorial Graveyard
HuntingBassets.com - A site dedicated to hunting with Basset Hounds