To copyright something, it needs to display three elements:
Originality: The work is an independent creation by the author, not a copy
Creativity: The work relies on an author's intellect and judgment
Fixation: The work is “fixed” into a tangible medium like a hard drive or physical pages of a book
The Copyright Act outlines technical criteria as well:
“To be copyrightable, a work of authorship must be fixed in any tangible medium of expression, now known or later developed, from which [it] can be perceived, reproduced, or otherwise communicated, either directly or indirectly with the aid of a machine or device.”