want to know How can you register while you are out of New York State?
Yes
You can request a New York State registration and a certificate of title by mail from outside New York. You should send these items to a local DMV office
Can I bring a copy of the proof of ownership?
proof of ownership must be original
If I am moving to New York State, do I then need to register my vehicle in New York State if already registered in a different state?
depends on various circumstances
if I am a New York resident and obtain a vehicle from another state that I will drive on the roads of the state of New York
you must register the vehicle here within 30 days
if i aren t a resident of New York