How could BJ or any auction house ever truly confirm the authenticity of any car and it's sale day components also why would they ever put themselves into this legally vulnerable position?.
What they can easily do at the very least is include the whole Vins w/ any and all advertising of vehicles listed for their upcoming sales also deny entry of cars who's Vins aren't supplied in enough time for them to list these Vins at least two weeks prior to or whatever time preceeding the sale date seems fair enough to allow prospective buyers to do their due diligence..
~ Pete