Is my version of Ventura a fully official one?

Hi, I am running oclp Sonoma on my MBP 2017. I wanted to make a volume with macOS Ventura, so I did. I booted it, and it booted normally. I set it up from new, and then I got a op-up notification, asking if I wanted to upgrade to Sonoma. Does this mean that that fresh install of Ventura is 'corrupted' with oclp? Or is it a fully supported, and original version of the OS?

Thank you