Pi music controversy

Since I last posted it (since I showed it in third period, come to think of it), the "What Pi Sounds Like" video by Michael Blake has since been made unavailable due to a copyright claim by Lars Erickson.  Erickson had previously composed a symphony based largely on the same idea (using the first 32 digits of pi mapped to the tones of a major scale, etc.). The piece was recorded in Ruse, Bulgaria, late last year.

Do you think the claim is founded?