But there is no need for the whole mining thing if the only transparency is needed. - publish all "transactions" (of any nature) - hash (transaction | hash of

But there is no need for the whole mining thing if the only transparency is needed. - publish all "transactions" (of any nature) - hash (transaction | hash of previous transaction) and sign the hash - publish signed hashes along the transactions - give customers back signed hashes of their transactions This way you have a system with proovable immutability and guaranteed inclusion into the transaction log. If anyone can come up with a signed hash of a transaction not in the log, it means the system isn't trustworthy and should be punished, through legal or market means. By the way, we already have a system like this in place: Certificate Transparency. There is no way one can buy "tokens" in such model though, so there is no incentive to hype it ¯\_(ツ)_/¯