Please read this. This is why statements of Hawaiian directors will never be valid proof. If he does produce a birth certificate and it is from Hawaii it is still not valid because of the statutes upheld in the state.
The following Hawaii state law (Hawaii Revised Statutes S. 338-17.8) allows children who are born outside Hawaii to obtain valid Hawaiian birth certificates, depending on the residency of their parents. This law isn't restricted to those born in the other 49 states; a child could be born in a foreign country and still get a valid HI birth certificate. This law was added in 1982, as confirmed by law librarians at the U. of Hawaii and L.A. County law libraries.
Note the fact that this applies to parents living in the "Territory" of Hawaii, an entity that was dissolved in 1959. If this law had been intended to only include children born in 1982 or later, would they have referred to the "Territory" of Hawaii? Clearly, this was intended to include those born before 1982 as well. http://www.capitol.hawaii.gov/hrscurrent/vol06_ch0321-0344/HRS0338/HRS_0338-0017_0008.HTM - actual statute from Hawaiian capitol.