That's not true. Those are registration records NOT ownership records. People do not purchase ip address or domains. They register them for temporary use.
For non-legacy allocations, point taken (but my original comment still stands if you replace "ownership" with "registration"). For legacy allocations, it's more complicated.
See: Are IP Address Allocations Property? (2014) https://www.ethanheilman.com/x/19/index.html