I think maybe there's a misunderstanding.
You will need proof of domicile in the US. Bank accounts, retirement accounts, health insurance, do not prove that.
A lease/ property title does.
A driver's license with a US address might help too.
A job contract does.
The CO might request to see evidence that you are either already living in the US, or that you have solid, concrete plans to move by a certain date. It is also advisable that you move either before or with your spouse (do not have the beneficiary come first on their own)