I'm just wondering what the first image uploaded to the site was

order:id status:any <- oldest images on this site

Images 1-12 were supposedly test images that were removed. Image 13 was taken down by the artist's request. Image 14 post #14 is the oldest surviving image.

Rooting around on the Wayback Machine eventually yields #13, but not #s 1 through 12, which were apparently test images that were subsequently deleted.

1-12 were probably something that was fiddled around with before the site was even public.