N.Y. Real Prop. Law § 399
The certificate of title, and any copy thereof duly certified under the hand and seal of the registrar and the owner's duplicate certificate, until the expiration of the time herein limited to bring an action or proceeding to set aside the final order or judgment of registration shall be received as evidence in all the courts of the state, and in all courts and places shall be prima facie evidence that the provisions of law up to the time of issue of such certificate or duplicate, or of the time of entry of the last memorial thereon, have been complied with, and that such certificate of title has been issued in compliance with a valid final order or judgment, and that the title to the property is as therein stated; and after the expiration of such time limited for bringing said proceedings to set aside said final order or judgment, such certificate or copy, up to the time of its issue, shall be so received as evidence in all courts of the state, and shall be conclusive evidence of the same facts. Every memorial or notation or cancellation thereof made on any certificate or duplicate or copy thereof shall be signed by the registrar or his deputy or his duly authorized deputy or clerk.
N.Y. Real Prop. Law § 399