#Proof-of-authentication:
    •   Bitcointalk username: sebas_ram
       Joined campaigns: article
       eth : 0xc0c77D00Bc2464DcD7DC9161c49B2509cC700aEd

https://steemit.com/spanish/@sebasram/cargocoin-plataforma-naviera-con-contratos-inteligentes