You can have immutability with an append only log.
What's key in btc is the network and the consensus which gives strength to the immutability claim.
If you have trust (eg. with a centralised system) you don't need consensus.
A commercial system is likely offered by a company who has stakes in the operation and can therefore provide trust without wasting all that energy and without consensus.
What's key in btc is the network and the consensus which gives strength to the immutability claim.
If you have trust (eg. with a centralised system) you don't need consensus.
A commercial system is likely offered by a company who has stakes in the operation and can therefore provide trust without wasting all that energy and without consensus.