for that case, you can use either the NY State Certificate of Title (original or a certified copy) or a acceptable proof of ownership from any other state.
Ok, now I need to know about the proof of ownership for snowmobiles purchased from a dealer.
for snowmobiles purchased from a dealer, you can use as proof of ownership the Manufacturer's Certificate of Origin or the Manufacturer's Statement of Origin. There are some more options.
What in case the owner dies. How does the transfer go?