Hi, please quote:
-----BEGIN BITCOIN SIGNED MESSAGE-----
Today is 27.02.2018 bitcointalk account schiavonxv (u=176646) belongs to this address.
-----BEGIN SIGNATURE-----
15aeNgPE3vysvEqrRWgA7Kgajc9VQkEw72
IFroGYRc6Mqa2MBqMVP92fI3Ma732KHUhyzdniFo5YWScx3pD5qDtBl/DecAXcWLiVCc4Y3ToXkdiiF9bL2ZejQ=
-----END BITCOIN SIGNED MESSAGE-----
Proof