I'm well aware, but still not official (no artwork released for example)
But the "Style Hymn" :)
https://www.openbsd.org/lyrics.html#70
But hey, if the Artwork is the release point for you, that's fine with me ;)
Also the homepage is a bit of a giveaway:
> The current release is OpenBSD 6.9, released May 1, 2021.
https://cdn.openbsd.org/pub/OpenBSD/7.0/amd64/