[URSpider94]

What if I've never heard of Madonna? Does the law actually encode some sort of pop-knowledge into itself?

No, but the fact that the site owner is using these screenshots to advertise his service obligates him to do due diligence on the copyright status of those tracks. Coincidentally picking one of the most popular artists of the last quarter-century to promote your site rings a little hollow.

Your jurisdictional argument also doesn't hold water. First of all, the site owner was operating in the USA, so he's bound by US law. Second, buying a "blanket copyright" in Russia doesn't confer rights to sell content in other countries.

[perlpimp]

If someone buys content from russia they are dealing with russian entitiy not with US one. Given that he can probably shore up some sort of company and do business through that via appointed trustee.