Actually the Danish is Crown over wave. You need to check her hip. See if there is a brand there. If there is, then she is a registered and branded WB. If not, and there is just the one on her neck, she could just be approved for breeding in a certain registry. I know with Danish, the top book mares are eligible to get a crown on their neck. The only horses that can be in Danish mare books are registered TBs or registered Danish. Not too familiar with the specifics from other books. Hope this helps a bit.