Out here it's been illegal for anyone to breed a dog with a wolf for ages. It was common practice for those living in very remote rural places to tie a husky or shepherd bitch in heat outside so that they would get bred by a wolf. But with all the accidents and aggressiveness these wolf pups brought, laws were set in place to stop this.
I took a look at the site, most of the dogs seem to be a mix of husky / Shepherd. We have a lot of those around here, people breed the two for more stamina for mushing in winter. From the looks of these dogs they are almost identical to the ones I see here. They have one dog that is simply a white shepherd with bad conformation and also the black. I don't think they have any way of proving they have wolf blood in them. There's a place in B.C. that breeds similar stuff, they been investigated quite a few times, don't know if they were closed down or not I didn't follow the story that closely.I don't recall the name of the place, if I think of it I'll send you the link.