Abstract: A method for generating digital certificates for anonymous users in blockchain transactions includes: storing a blockchain comprised of a plurality of blocks, each block including a block header and transaction values, where each transaction value includes data related to a blockchain transaction including a sending address, recipient address, and transaction amount; receiving a certificate request from a computing device, the request including a user public key of a cryptographic key pair; identifying a subset of transaction values in the blockchain where the sending address or recipient address was generated using the user public key; determining a confidence level based on the data included in each transaction value included in the subset; generating a digital certificate based on the determined confidence level; and transmitting the generated digital certificate to the computing device.

Abstract: In one aspect, a computerized blockchain-based method comprising the setp of providing a marketplace blockchain-based protocol platform. Tthe marketplace blockchain-based protocol platform comprises a blockchain based distributed computing platform that hosts critical transaction records in a blockchain, and a universal-verified profile module that manages a decentralized trust and identity platform, wherein the universal- verified profile module enables users to create a single, verified profile across all sharing platforms while retaining control of their personal information, a cryptocurrency module that provides and manages a blockchain-based cryptocurrency, a lease/contract module that manages and provides a set of smart contracts;, and an off-blockchain storage.