Saying this is second party source is not quite true. Back in 2017, Arty did have Moegan Photography publish her photos for a while. They were the photoghrapher, editor and publisher to her cosplays.
Don't know what their relationships are now though.
And damn, I miss Arty's photos in the old days. lol She went with showing her assets a little (and I mean a lot) too much these days.