-----BEGIN BITCOIN SIGNED MESSAGE-----
3888 - Bitcointalk.org - 12 Sep 2015
-----BEGIN BITCOIN SIGNATURE-----
15g8vaneG5pkvHgGTz4UkPynWvFuJyCKza
IKLH+cmsSGVBlE9RmeBFUqHXbeE89JdatPUSK0rG+ao/bxtvd/0qcHQ5rfO3VEeXrRvbuFfzs5k8isrp1TzM504=
-----END BITCOIN SIGNATURE----
First it didn't worked but i used brainwallet offline and Bicoin-QT to verify Message verified to be from 15g8vaneG5pkvHgGTz4UkPynWvFuJyCKza
. (I find the brainwallet format a little weird, it seems to generate padding issues. I never used brainwallet though, so it could just be me!)