[justsomeadvice0]

We are on the same page. I do think there are some gains, although I question the use of "permissionless" blockchains (we have to remember to add this caveat now since we decided 90s tech should now be called "permissioned blockchains"). A simple published ledger ("immutable append-only", like CT logs) seems like a much easier route. If nodes care enough, they can poll it and alert when the tip changes in a way that should not be allowed.