jihwang kim

More details are on github https://github.com/Unchain-ETHSeoul/ETH-Seoul--SoulTag We have recognized that too much of our personal information is abused in our daily lives. Our information is being processed and sold by unreliable third parties. But we are too defenseless on these issues. Blockchain has brought information transparency, but the protection of personal data has not yet been achieved. This is the biggest wall that blockchain has to overcome in order to be applied in reality. Our experimental protocol design makes it possible to achieve self-soverign identity (SSI) by delegating privacy and privacy rights to individuals. We make many things possible, such as data selling and rental, through this point. Also, this will solve the flaws of nft and maximize the performance. It is expected that many problems of the Defi ecosystem can also be solved based on the utilization of this protocol. We propose a protocol that achieves both anonymity and confidentiality without using zkp. This protocol allows us to achieve SSI.

📌 The Problem image Today, builders have no unified way to prove who they are or what they’ve done. Every time they join a hackathon, apply for a bounty, or look for teammates, the same loop repeats — sending DMs, filling out forms, sharing links. There’s no persistent identity that connects wallet → person → proof of work. This fragmentation makes collaboration slow and trust hard to build. Project owners struggle to find reliable contributors, and talented builders lose visibility beyond their immediate circles. Even after completing real onchain work, there’s no easy way to showcase achievements, verify experience, or turn reputation into new opportunities. 📌 The Solution - BaseCard image BaseCard becomes an onchain business card that instantly displays a builder’s identity and proof of work — both onchain and offchain. It standardizes how builders present themselves, linking wallets, socials, and verifiable contributions into a single identity layer. 📌 Base Earn — Turning Identity into Action image image Base Earn extends that foundation into action. It connects verified builders with paid opportunities, and every completed task automatically updates their BaseCard — compounding trust across the network. Together, BaseCard and Base Earn make building easier, safer, and faster, by turning every piece of work into verifiable reputation that lives onchain. 📌 Why We Introduced BC Token image We added BC Token to reinforce the trust loop between identity and action. BaseCard and Base Earn already verify who you are and what you’ve built — but we needed a native incentive layer that rewards meaningful participation and discourages spam. BC Token turns every step of the builder journey into a verifiable signal: image Earn BC by proving identity — creating your BaseCard, linking socials, adding proof of work. Spend BC when applying for bounties — signaling commitment and filtering serious builders. This simple earn → spend mechanism keeps the ecosystem trust-based, spam-free, and self-sustaining. It’s not just a token — it’s how we turn effort into reputation, and reputation into opportunity.