The Onchain Payments Unconference is a closed-door session in New York bringing together builders, operators, and institutions to discuss practical challenges in onchain payment systems. Structured as an unconference rather than a panel format, participants will break into small groups to examine two themes: compliance, covering how regulatory requirements shape payment infrastructure, and privacy, addressing where transparency conflicts with real-world financial system needs. Groups will reconvene to share findings before an open discussion. Refreshments will be provided.