BTC addresses use Base58 (like Base64 but without the need of similar character: IOl0+/) and should start with either 1, 3, bc1q or bc1p dependant upon what type of address it is actually. Ethereum addresses are one of a kind identifiers accustomed to mail, obtain, and retail store Ether (ETH) https://ethereumvanityaddress87418.popup-blog.com/29093378/rare-address-no-further-a-mystery