I was wondering if it gave you some code or something, since I have already bought it on xbox.
How to get Minecraft for free on Xbox One if I purchased it on the Xbox 360?
logan 10.05.2016
No, it used to be discounted, you could buy it for $5 if you own the 360 version, but I don't think that offer is valid anyone.
Ducky 13.05.2016
I'm not sure as i'm not an xbox player but i think the new xbox has like i don't know backwards compatibilty but in your case you'll probably have to buy it again.
Minecraft 13.05.2016