[casual_slacker]

There are cases in history where records offices were held in rebellion for political purposes. A blockchain would change means of control of records from violence to compute power.

[1] https://en.wikipedia.org/wiki/Texas_Archive_War

[umanwizard]

Whoever has the ability to do violence will always have ultimate control. They could just force everybody to start accepting a different blockchain.

[PhasmaFelis]

Relevant xkcd. https://xkcd.com/538/

[PhasmaFelis]

For these purposes, the blockchain is just a fancy way to maintain accessible backups. It doesn't give anyone but the government "control". The law is always what the government in power says it is, pretty much by definition.