Yes but from what I'm hearing its 99% final RTM.
A copy is a bit of a misnomer as there are several steps to install it WZor made it/them available in one chunk but one needs to follow the install instructions carefully.
Check WZors page:
FEBRUARY 26, WINDOWS 8.1 SPRING UPDATE 2014 SIGN-OFF GOLD RTM.
GOLD RTM BUILD: 6.3.9600.17031.WINBLUE_GDR.140221-1952
is now final and Signed Offhttp://wzor.net/22986.html
I did the 5/6 steps that were posted before WZOr made his large chunk available, mine came from MS using a DL code/url to snag them. I tested it in VMware & had no problems at all, I did install it over the last update #17025 though.