Is it possible to unregister/switch console ownership account?

Hey there cptgantu!

Are you referring to setting your Xbox One as your account's home console? Any user can do that. If you're referring to having the Xbox One update preview registered under your GT, you would need your brother to invite you and wait for an invitation from
the Xbox Preview Team.

So it'd be impossible for me to move my Minecraft account to a new email?

Hi there Sir N, my name is Gerardo, and I'm an Xbox player, just like you. I'll be happy to assist you with any questions or concerns you may have.

I'm sorry to inform you that it is not possible to transfer game licenses or purchased items between two different Microsoft accounts.

However, if you play on an Xbox console, you can use the Home Xbox feature to share the game license with other accounts you use on your console, using the instructions in the following link:

https://support.xbox.com/help/hardware-network/console/my-home-xbox

Please keep in mind that in this public forum, we are just fellow players like you, trying to help other players with our best intentions.

I appreciate you understanding and if you have further questions please let me know.

Kind regards,
Gerardo.

Hi again Sir N,

Unfortunately, that would not be possible, as I mentioned earlier. I know it's not the answer you're looking for, but truly, it can't be done in any way.

Kind regards,
Gerardo.

Please don't bump old threads.

It's not possible to unregister a code and nothing can be transferred between accounts.