I am guessing as the original punk url is https://f002.backblazeb2.com/file/hivepunks/4468.png if you were to download the picture and upload it, your url would look like this
as the filename is just the punk number. I might be wrong as well.
https://images.hive.blog/DQmXBzmydCMNwSV8e6fTVjbmRSuHDMUjn7abgrtAp6ci5Kb/4468.png / https://images.hive.blog/DQmXBzmydCMNwSV8e6fTVjbmRSuHDMUjn7abgrtAp6ci5Kb/4468.png
I was also wondering about the 990 - which now is changed by the seller.
I know for a fact that neither of the two users listed above with 990 are owners of the punk, as they both are members of my Splinterlands guild. Discovered now that you still got the "set as Hive avatar" link/button available on all punks even if you don't own them, which makes the path look legit, I guess (but not on the block chain ofc). :P
Oh right gotcha now! Can't know about that as I don't own many to sell :D but thanks for the spot - I guess with a more complex query on the transactions could be a way to corroborate the ownership if the possibility of removing the "set as hive as an avatar button" even if you don't own it, is not an option.