Man... I hate to be the one to say this, but... it is alleged. HC hasn't actually shown an agreement, or a license, or anything. I've scoured the announcement post, the FAQs, the ToS, everything, there's nothing. And NC hasn't made any comment, in any capacity (official or otherwise), that I can find. We're taking them at their word, but that's what an allegation is, someone's word without evidence to support it.
Granted, if it wasn't a fact, NC would've brought a mountain of shit down on the HC team by now, given all of the press, but it's still an allegation until either the license itself or a comment from NC is publicly available.