It is possible to unlock achievements for Xbox One, via the xbox 360 profile? Only just got back into xbox and picked up a xb1 the other day
Dont really think that would work.
I think they try to seperate the achievements so thats not an option.
When you are logged in on your Xbox 360 it will say you got X Xbox One Achievement.
Could of course check if you find anything else in your profile if you use the content explorer.