The next generation Professional Social Network incorporates a "certificator" and rating system certified by a smart contract, with a sector-specific e-commerce. The Word-of-Mouth market is worth over 189 billion dollars and has over 116 million operators. The growing popularity of social networks has further boosted the industry and has allowed the proliferation and diffusion of "unverified" information on the real ethical-professional qualities of companies, operators, and partners. The Eucleia platform and WMPRO blockchain satisfy the need for a decentralized, secure, inviolable, certified database, with truthful and transparent information on the features of the companies and their operators.