Actually, according to your own words, that's exactly what you did. And while I may be coming across as blunt about it, I hope I'm not coming across as critical. That's not my intent at all. There have certainly been cases where folks bought a "normal" BP and it turned out to be something special. If you feel like you have one of those...then that's great. The only way to know, though, is to breed it and prove it out. In the meantime, if it looks like a normal, and has a normal background (ie: unknown breeding, normal price for purchase, etc)...it's 99.7% certain to be a normal.