imageboard first-party source

A post that was originally uploaded on another imageboard by the artist themselves, and then uploaded from there to Danbooru.

Posts from these sites, such as Gelbooru, e621 or Rule34.xxx, are almost always reposts, so this tag is used to find the rare exceptions. Imageboards like Vinesauce's Vinebooru don't count for this tag, as self-uploads are the norm for them.