Yikes. OK that seems like not a proper use of all this, then!! Seems like it would be more valuable to transact with just the artwork data signed by the artist'

Yikes. OK that seems like not a proper use of all this, then!! Seems like it would be more valuable to transact with just the artwork data signed by the artist's private key maybe with a bit of other metadata. But a URL??? Sounds like a lot can go wrong with that.