Look up the definition of "property". You'll find that it says nothing about it needing to be tangible. It literally just means "something that can be owned".
What you are saying is inherently contradictory. The "physical disc" is comprised of tiny peaks and valleys. If I "own the disc" why can I not do whatever I want with those peaks and valleys?
Look up the definition of "property". You'll find that it says nothing about it needing to be tangible. It literally just means "something that can be owned".