The fiduciary, just like with CIP, is your account holder.
1020.100(c) Customer. For the purposes of §1020.220:
(1) Customer means:
(i) A person that opens a new account; and
(ii) An individual who opens a new account for:
(A) An individual who lacks legal capacity, such as a minor; or
As far as titling the accounts, refer here:
https://www.ssa.gov/pubs/EN-05-10076.pdfI quoted the above directly from this document.