> now from a first glance it would have the more senior copyright claim.
So what? What matters is authorship, not the date at which it was published on this or that website. Even if a website copies your text, no matter the date, that is still your text and still copyright infringement no matter what if you didn't license this text to them.
So what? What matters is authorship, not the date at which it was published on this or that website. Even if a website copies your text, no matter the date, that is still your text and still copyright infringement no matter what if you didn't license this text to them.