What, Where and Who is Harry Potter?

A throwaway comment from his Aunt Petunia after accidental magic, a discovery of his parents' photos and will, and hearing his guardians discussing him turn Harry Potter into Jamie Evans-Black. Shy, in over his head, anxious, musically talented and clever Jamie is found by Albus Dumbledore and Sirius Black in a loving home. Can he be the Harry Potter the wizarding world expects?