The Google search seems inconclusive. Yeah it brings up an article that states "Xbox finally owns Crash...", but that could simply be a case of media outlets taking information out of context and in some cases jump the gun as so many of them do (I even saw a case of this pretty recently).
Not to mention the Google search page brings up the question "Does Microsoft now own Crash Bandicoot?" and brings up "Activision still owns Crash Bandicoot" as the answer which seems like a closed case until you look at the source and find it was referring to a rumour in 2013 that Sony bought Crash from Activision. Stupid AI.
Yes, it does seem inconclusive. I also came across across a wiki page regarding franchises owned by microsoft. It did list Spyro and such but not specifically crash. But i am not sure how much I can really trust wikipedia.
Include both names in copyright can't hurt i suppose