Hope I did it right! Takes me sometime, but the instructions that you provide helps me a lot. I used the Mycelium app to signed the message. Thank you.
P.S.:First time to signed a message 😁
-----BEGIN BITCOIN SIGNED MESSAGE-----
I Lycan70 of bitcointalk is claiming the ownership of this bitcoin address this 13th of October 2020
-----BEGIN BITCOIN SIGNATURE-----
Version: Bitcoin-qt (1.0)
Address: 1Nm5k9Kt9abrEP3z8r3PrT7yBjfgiPpnYi
H/9DSt3W+eTG5L3G1aq6e7/Jb7A0wgxI+3Ugj5AqozPFTydbGcQc71w1WjrcLbD9CIzCDadHmK2lFVweK88qmMk=
-----END BITCOIN SIGNATURE-----