Importation and exportation allows software services in blockchain environments. Blockchains may import data and export data, thus allowing blockchains to offer software services to clients (such as other blockchains). Individual users, businesses, and governments may create their own blockchains and subcontract or outsource operations to other blockchains. Moreover, the software services provided by blockchains may be publically ledgered by still other blockchains, thus providing two-way blockchain interactions and two-way ledgering for improved record keeping.