Hallo,

I staked on forum following addresses:

18GTv1CFmMTVCyzcynB5Y9RPxy89vGHdFA  - From 1Broker
1P2zMTqBGdzvbyojzzBHEKm1Np8ACa8Zi3 - From Yobit

Sign a message from this wallet is not allowed, so how i coul confirm in future that i own this addresses yet?