To answer your question, NSRP requires the primary supervisor to be a psychologist. If the supervisor of your internship was a psychotherapist, and not a registered psychologist, then the internship would not meet all NSRP requirements.
However, you have noted that your practicum was supervised by psychologists. If you applying to NSRP for registration, then such information should be identified on the verification of practicum form with respect to the practicum. However, the verification of internship form should accurately reflect the qualifications of the primary supervisor which you noted was a psychotherapist.