Porn Star Amia Miley -- PROOF I'm the Bare-Assed Kim Kardashian-Alike

And now -- undeniable proof Kim Kardashian is NOT the owner of the beautiful bare ass Kanye West allegedly tweeted early Wednesday morning ... proof that comes in the form of incredibly bizarre body piercings.

Porn star Amia Miley has already taken ownership of the pic in question -- a perfectly tanned rear-end snapped inside some fancy hotel room -- but people have been clamoring for proof to back her claim ... so she's decided to deliver.

Amia was out in L.A. yesterday with her "Jersey Shore" star boyfriend The Unit -- where she showed us her unusual (hot) piercings on her wrists and back ... piercings that match up with those in the infamous photo ... and which Kim Kardashian does NOT possess.

Check out the clip for the real story behind the pic.

For the record, Kanye has publicly denied ever tweeting the pic, saying he doesn't even recognize the girl in the photo.

Now we ask the obvious question ...