Circle targets September 16 for the launch of the Arc public mainnet, according to materials described by The Defiant. These materials also name Circle and 11 founding validators.

A separate Arc documentation page indicates approximately 20 validators at launch. The source does not explain why this number differs from the 11 founding validators.

For the infrastructure market this means the specified launch date and the initial validator set. However, available data are presented only as metadata and a summary of The Defiant, so details of architecture, functions, and readiness remain unconfirmed.