1. A computer-implemented method for identifying and reporting an audible performance of a musical work recorded in a medium of fixed expression, said method comprising the steps of: (a) training a neural network to generate an output signal corresponding to recognition of a selected retinal sample of said audible performance; (b) receiving an audio signal from a performance broadcast; (c) processing said audio signal to create a series of overlapping retinal samples of said audible performance, wherein each said retinal sample includes a plurality of digital signals representing a spectral and temporal distribution of power of said audio signal; (d) generating said neural network output signal responsive to said series of overlapping retinal samples; (e) comparing each said neural network output signal with a corresponding predetermined threshold signal; and (f) logging a record of the broadcast of said musical work performance responsive to said neural network output signal exceeding said corresponding predetermined threshold signal.