Caldera OpenLinux Workstation release 3.1 is a Linux, desktop operating system (OS) based on the Linux 2.4.2 kernel. It's for stand-alone use or network use as either a client or server. Caldera started shipping it on June 30, 2001. OpenLinux Workstation 3.1 replaces eDesktop 2.4 in the Caldera products lineup.

I have a screenshot I took on July 23, 2003, as you can see from the timestamp at the bottom. I used an application I used to use as a paralegal to take screenshots that would be accepted in courts of law to establish dates. OpenLinux 3.1 sources were still available for download 4 months after SCO began its IBM litigation, from ftp.caldera.com, and no, I saw no wording telling me that it was for prior customers only. Yes, the files were there. I actually am a prior customer, one step removed. I was given a copy of OpenLinux before this date, but in any case, there were no restrictions on the page that I saw.

Yes. That means to me that SCO released it under the GPL once and for all, and by then they had already "discovered" its contents.

You could also buy OpenLinux on Tucows in June of 2003:

Or, if you preferred, you could get OpenLinux Server from InActSys in June:

They had the OpenLinux 3.1 Workstation available also in June: