USG Reference Registry

The USG Reference Registry provides the first canonical dataset of leagues, teams, venues, broadcasters, rights bundles, and events for the Universal Sports Graph. It defines stable identifiers, schema-backed JSON records, deterministic formatting, machine-generated indexes, and registry-level metadata aligned with RFC 0001 and RFC 0002. This artifact anchors entitlement validation, rights resolution, and clearinghouse settlement in real-world implementations.