The domains were registered at NetSol, a registrar typically used by businesses as opposed to individuals, and the registrar Rockstar now use for their domains. Domain registration costs $35/year at NetSol, plus an additional $10/year for privacy. Each domain was registered for 5 years. At the time of posting, current prices and discounts would put the total cost of this order somewhere around $700-$800. Is there really someone out there willing to spend that much money on a hoax? Personally, I doubt it.
The real question is whether or not they are to do with GTA V. If we assume they are, then it does confirm one thing - the game will be set in modern day, or at the very least the mid-late 90s when the internet started to take off. That said, there is of course the possibility that even if the domains are owned by Rockstar, they may have nothing to do with the next GTA. In the end all we can say is that only time will tell.
Still, it's an interesting discovery, and one which is sure to raise interest in GTA V. What are your thoughts on this? Do you think they are owned by Rockstar? And if so, do you think they are related to GTA V?
One final note: It's worth pointing out that while Rockstar do own gta5.com, the domain gtav.com is owned by a domain squatter. If Rockstar go with this name for the game, they will acquire the domain from him (with relative ease), and we'll notice a change in the WHOIS details, so that's something to keep an eye on.
Credit to BeefJack.com for passing this on.