With https://cdn.openbsd.org/pub/OpenBSD in /etc/installurl, sysupgrade currently fails:
$ doas sysupgrade SHA256.sig 100% |************************************************************************| 2141 00:00 Signature Verified Verifying old sets. base65.tgz 100% |************************************************************************| 205 MB 00:55 bsd 100% |************************************************************************| 15658 KB 00:05 bsd.mp 100% |************************************************************************| 15752 KB 00:02 bsd.rd 100% |************************************************************************| 10022 KB 00:01 comp65.tgz 100% |************************************************************************| 73007 KB 00:07 game65.tgz 100% |************************************************************************| 2747 KB 00:00 man65.tgz 100% |************************************************************************| 7391 KB 00:01 xbase65.tgz 100% |************************************************************************| 22580 KB 00:02 xfont65.tgz 100% |************************************************************************| 39342 KB 00:04 Verifying sets. (SHA256) base65.tgz: FAILED (SHA256) bsd: FAILED (SHA256) bsd.mp: FAILED (SHA256) bsd.rd: FAILED (SHA256) comp65.tgz: FAILED (SHA256) game65.tgz: FAILED (SHA256) man65.tgz: FAILED (SHA256) xbase65.tgz: FAILED (SHA256) xfont65.tgz: FAILED -- Kusalananda Sweden