Rottweilers are purebred dogs. Although this isn't the case in every instance, an easy way to recognize that your Rottweiler is purebred may be the unique color of the dog’s fur or its adherence in physical attributes to the AKC standard.
Even a mixed brindle Rottweiler is going to have an extremely beautiful coat. The unique brindle pattern is known to give dogs of various breeds immensely beautiful coats, and the brindle Rottweiler is no exception.
The best way to ensure that you're receiving a purebred Rottweiler is to purchase from an AKC registered breeder that can give you the dog’s pedigree. A pedigree is issued for dogs with AKC registered family lines to ensure breed purity.