Twin3: Pluralistic Personal Digital Twins via Blockchain

In the era of generative artificial intelligence (GAI), preserving personal authenticity is crucial for maintaining trust in online communities. Blockchain technology, with its unique blend of anonymity and data transparency, has facilitated the development of decentralized identities (DIDs) on the internet. These DIDs serve as digital representatives for individuals online, enhancing user trust through self-sovereign identity, transparency, and user control, while strengthening privacy. Current DID solutions, such as Proof-of-Personhood and Proof-of-Reputation, have demonstrated technological maturity and paved the way for identity applications in Web3. Building on this foundation, the Twin3 project advances the concept further by introducing the innovative Proof-of-Authenticity (PoA) to represent pluralistic human characteristics in digital format. Specifically, Twin3 employs blockchain-based Soulbound Tokens (SBTs) to transform human identities into a programmable hexadecimal matrix with 256 characteristic spaces, representing a comprehensive spectrum of human attributes, akin to a digital DNA (Decentralized Nexus of Authenticity). This study presents the Twin3 system architecture, user data management,demonstrating how this approach can enhance personal digital identity verification and management. The potential applications of Twin3 SBTs in creating personal AI agents and facilitating participation in the agentic economy are explored, demonstrating how Twin3 can digitize human attributes comprehensively and empower individuals within emerging agent-based workflows and digital ecosystems.