For all I care, the paper log need not even be human readable just so long as it is a physical and non-changeable log. I would like the log to be multi-format,

For all I care, the paper log need not even be human readable just so long as it is a physical and non-changeable log. I would like the log to be multi-format, both human readable and machine readable so the logs could be quickly scanned to validate accuracy with the electronic record.