N.Y. Public Health Law § 4138-C
3. For the purposes of this section, the term "non-identifying information" shall only include the following information, if known, concerning the adoptee, parents and biological siblings of an adoptee:
4. Upon acceptance of a registration of an adoptee born in this state, or by a birth parent or biological sibling of such adoptee, pursuant to this section, the department shall search the records of the department to determine whether the adoptee's adoption occurred within this state. After making a determination, to the extent practicable, as to whether an adoptee's adoption occurred within this state pursuant to subdivision two of this section, or upon completing a search of the records pursuant to this subdivision:
5. Upon acceptance of a registration pursuant to this section, the department shall search the registry to determine whether the adoptee, any biological sibling of the adoptee, or birth parents of the adoptee is also registered.
6-a.
7.