Artisan Hash Digests #3
Description
For some charts (perhaps handwritten charts of fairly basic songs), we can make premium hash digests which include, for example, some of the chords of the song, or part of the name of the session musician, etc.
Obviously it will take significant computing power to perform many guesses of input to find digests that meet these criteria. It might also be interesting to perform the computation at a particular spot that confers value for fans, such as at a musician's home or in the studio.