[miracle2k]

This is not attempting to prove something previously unknown, or resolve an active uncertainty of authorship. But if an artist claims ownership over a work/token, and collective history remembers and validates that claim, then you can prove that you own that token.

[joosters]

If something is already known and collectively validated by history, then you don’t need a blockchain to prove anything.

Conversely, it is the previously unknown things that would most need some confirmation of authorship, yet here the blockchain concept fails again!

[miracle2k]

We need it to prove ownership (of digital things), not authorship.