@Osha
As far as I see, if I paid for something that does not repeat anywhere else, and I had always made it clear with artist that I seek to use their artwork however I please, and that all rights to use it are within mine control, the case for me owning it is pretty clear. Same way as when you buy a bar of chocolate in a grocery shop, you can do everything with it, after all, you had paid for it, and you own it.
This is quite different from finebros thing, as in that case, they tried to copyright an entire type of videos, whist in my case, I own but a single thing. It’s same way how you cannot take someone else video on youtube, upload it on your channel, and then get monetisation based on it. Whist the video follows a type that none can own, you still own your own video, as you have made it/paid for it being made. And as such, you just own it, based on spending your effort, either directly (creating it) or indirectly (paying your effort in form of tokens that you have got from other people by spending your effort on their wishes.)
As far as proving that it’s my character, simple, you can contact an artist who will tell you as much as I had, or you can contact commissioner using info they always leave in description.
But, all of this is offtopic, and not really even about the point.
I don’t wish to block everything of my OC on this website for being featured here, as I know that is pointless, just as I know about Streisand effect, and if I would actually DNP my character here, I do know that there would be a
lot of arts with them in it created, (which, if you want, please, go ahead, I’d love to get freebies.)
I however wish to have control over few arts that I wish to use elsewhere. It’s just that, I believe some here might think that is some ideological struggle, it is not. I just wish to have that few arts to use elsewhere, and as such, I want to have control over them.