Sure, proof of vehicle ownership is a Manufacturer's Certificate of Origin.
What do I need to do if I want to trade in or sell my vehicle?
You need to make sure to remove the license plate and windshield registration stick that shows your plate number.  This will help prevent you from being charged any type of parking ticket that doesn't belong to you.
What happens if I don't turn in my plates?
Your driver's license could be suspended.
the atv registration and expiration date. What if the ATV was not previously registered from a NY dealer
You must complete a vehicle registation/ title application at the NY DMV
What if the vehicle is over 70 inches wide
Then it will not be regarded as an off road vehicle
Who can operated the ATV