The original file is too big for Danbooru (100 MB max upload file size), so I resaved this as a lossless WebP and uploaded it to the site instead as it flies under the upload limit. The original file, a PNG, can be downloaded via the source link.

Using this script I was able to confirm that both the original and the recompressed .webp have a pixel hash of 193296911bd8cbcb23b00b1081f71c24.