[gfodor]

It’s hard to say if the link rot will be a problem. Not to mention, many of these ownership transactions won’t be links. The point is being able to agree on something, not have access to the underlying. The latter is a somewhat orthogonal concern. No matter what Zuck does, it won’t be possible for people to deny who owned the hat, regardless of if the underlying bits of the hat have gone away. And of course, for the things that people actually care about, these bits will be preserved, or over time the ownership will be understood to relate to new, probably better bits.