The created_at field just holds the Unix Epoch of when the note was created. A client can set that to whatever it wants, and most relays will accept posts from the past.
Discussion
That makes sense, but also the implications are kind of scary 😂
I wonder if there’s a way to leverage Open Timestamps or similar, to prove the ~blockheight of when something was posted. Maybe a service that aggregates and merkelizes a bunch of notes, and puts some piece of data on chain.
Why is that scary, specifically. I ask because I don’t see it.
The implication is that you could post anything as though it were posted in the past, and point to it as evidence, etc
That is an interesting possibility. I’d be interested in the trade offs. There is utility to being able to post date events as well.