(splinter thoughts on this): How can one call a digital fingerprint for a digital creation by my digits a copyrightable material, versus an actual fingerprint

(splinter thoughts on this): How can one call a digital fingerprint for a digital creation by my digits a copyrightable material, versus an actual fingerprint of my digits to ensure one produced said material? If every key on a keyboard took a fingerprint scan before submitting the unicode for whats being typed? Scould you expect a smart machine to have an individually signed keypress for the code generated? Biological-keylogger So if every key on a keyboard were a touch-sense input button? Then add pressure and you can get emotional sentiment analysis on angry typing or not - or thoughtful typing of a cadence of thought? Or touch-type-training for keyboards which map to a typing style - or an educational/mental ability acuity level? Maybe you can have a typing cadence associated with a fingerprint signature such that you can modify the behavior of a system based on who is typing what... If the software was adaptive to how you interact with it, that would be interesting - then you can have a true provenance for snips of code?