Do you know about NY State vehicle registration, and what can I use as proof of ownership for a trailer model 1976?
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.