zenegg said in forum #444802:
Given that both the original website and the DLsite listing appear to be unavailable now, what would be the proper way to indicate the source when uploading these works?
Wayback Machine has 29 captures of the main webpage. Look for a capture made around the time you first downloaded the image and browse the links like you normally would until you find it. Then put the URL in the source field.
Make sure the images are actually the same. You can compare the image URLs with https://duplicatebooru.zipfiled.info if they're both online, or you can download both and use a hex editor to compare them (HxD is a good choice).
Also, make sure you remove the extra web.archive.org parts and use the original URL. We want to avoid linking directly to the archive whenever possible. If the link is broken, add the original URL anyway and tag the post with bad_id.
For the DL product, if you can't find the page it was on, you can just put the product name in the source field. If you got the images from the webpage instead of the product, you can mention that in a comment.