Thanks Stephen! I hadn't done much research into this prior to the comments posted here. Really good suggestions here. I really like leaving off the copyright altogether...it seems Google does this and CSS Tricks does it as well.
I can think of a way to do what you had suggested with method b) for static generators since all files have the date in which it was created in the file name and written in the front matter.
Would love your thoughts and would love to update this article based on some feedback on what the best way to handle copyright for a site.
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