Viva Republica, the operator of South Korea’s mobile money transfer platform Toss, has reportedly entered the next stage of its blockchain payment strategy by signing a memorandum of understanding with blockchain developer Optimism to test a Korean won-backed stablecoin infrastructure for institutional payments.
The initiative will also involve privacy technology provider Sunnyside Labs in a three-month proof-of-concept (PoC) project aimed at evaluating whether blockchain technology can support secure, compliant, and efficient payment infrastructure for domestic financial institutions.
The three-month pilot will use Optimism’s OP Stack and Sunnyside Labs’ Privacy Boost protocol to develop and evaluate a Korean won-backed stablecoin infrastructure for institutional payments.
According to reports, the participating organizations will assess the technical and regulatory feasibility of using a won-denominated stablecoin within South Korea’s financial system. The project is expected to examine whether blockchain-based settlement can satisfy the operational and compliance requirements of banks and other regulated financial institutions while maintaining the efficiency benefits associated with distributed ledger technology.
The proof of concept will leverage Optimism’s OP Stack, an open-source framework used to build scalable Layer 2 blockchain networks, together with Sunnyside Labs’ Privacy Boost protocol, which is designed to enhance transaction confidentiality on public blockchain infrastructure.
Focus on Compliance and Privacy
A major objective of the pilot is to determine whether financial institutions can retain control over the transaction settlement process while operating on blockchain infrastructure. The companies are expected to evaluate how institutional participants can oversee payment execution without compromising the transparency and security inherent in distributed ledger technology.
The project will also explore whether essential regulatory requirements can be effectively integrated into blockchain-based payment systems. Specifically, the participants intend to assess the implementation of know-your-customer (KYC) and anti-money laundering (AML) verification procedures, which are considered fundamental compliance standards for regulated financial services.
Another key aspect of the trial involves determining whether transactions can remain confidential despite being processed on a public blockchain ledger. Balancing transaction privacy with regulatory transparency has become an important challenge as financial institutions explore blockchain-based payment networks.
The proof of concept will evaluate whether blockchain-based payments can support institution-controlled settlement, KYC and AML compliance, and transaction privacy on a public blockchain network.
Building a Foundation for Stablecoin Payments
Reports indicate that Toss plans to use the findings from the three-month pilot as the basis for developing a compliant stablecoin payment infrastructure tailored to South Korea’s financial sector. If the project demonstrates that blockchain technology can satisfy both operational efficiency and regulatory requirements, it could support broader adoption of stablecoin-based payment systems by domestic financial institutions.
The initiative reflects the growing interest among financial technology companies and blockchain developers in integrating digital currencies into regulated payment networks. Stablecoins have increasingly attracted attention because they combine the efficiency of blockchain transactions with the price stability of fiat currencies, making them suitable for settlement and payment applications.
As regulators and financial institutions continue evaluating the role of stablecoins in modern payment systems, pilot projects such as this provide an opportunity to test technical performance, compliance frameworks, and privacy safeguards before wider deployment.
Toss intends to use the results of the pilot to lay the groundwork for a compliant Korean won stablecoin payment infrastructure capable of supporting institutional financial transactions.
The collaboration also highlights the broader trend of financial institutions exploring blockchain technology to modernize payment infrastructure while ensuring adherence to regulatory standards. By examining settlement control, compliance verification, and privacy protection within a single proof-of-concept environment, the participating organizations aim to determine whether public blockchain infrastructure can meet the demands of regulated financial markets.
If successful, the pilot could contribute to the development of blockchain-enabled payment systems that improve settlement efficiency while maintaining the oversight, security, and compliance expected by financial regulators and institutional participants in South Korea.