Violation of a registered copyright only carries punishment if "the" UUID of the work is registered and is contained in the work (byline, front page, whatever as appropriate). Doesn't actually matter if the UUID has any relationship to the work, although it would be nice if it did.
Example, This HN post from 2014 is registered copyright UUID 12345-23-242342 by VLM.
In 2097 simply check https://copyright.example/12345-23-242342 for current status. Instead of copyright.example, I hope they can think of a more intelligent international (interplanetary?) domain name, but the general idea holds.
Don't want copyright enforced on a work created in 2015, simply neglect to list the UUID you got at registration. I see no reason a registration should be expensive other than the usual crooks trying to eliminate competition. No technological reason.
False claim (intentional random numbers instead of valid registration) equals instant public domain.
Essentially this large integer is the title - registration ID - type of concept for this copyrighted media.
Personally I think it would be awesome if the title generator also stored licensing info. My panoramic landscape photo is not only registered to me, but is CC:NC. If you messed with the system you could force all UUID beginning with 0 to be all rights reserved, all UUID beginning with 9 to be CC:SA. Just keep on generating UUIDs until you get ASCII codes for C, C, S, and A as the first 4 bytes for a CC:SA UUID. Or the first 3 bytes being ASCII G, P, and L. Better be a long/wide UUID system.