I need a different sort of artist tagging help. I believe I've found the artist for post #134061 and post #9994 and its child but I'm suspicious of copy-cats and art thieves so I'd like a second (or third) opinion. The artist in question is Yami Kosaka.

The URL found on the previously mentioned posts now only has a picture of a cheetah and no links to the artist's new website. On the suspected new website there is an entry on his journal comparing a recent drawing and post #9994. I'm not sure what's actually being said but perhaps there is a clue in that entry somewhere.

A cropped but higher resolution version of post #134061 is on his Pixiv account.