Orbital Hubs depend on The Substrate to function as parts of a coherent whole rather than isolated conferences. - Event mesh Schedules, assemblies, governance games and outputs from all hubs and satellites are coordinated and published through the Substrate. - Membership and charters Host institutions enter into shared membership agreements and charters via the Substrate, committing to Space Commons principles. - Data and media Transcripts, recordings, visualisations and legal drafts produced at Orbital Hubs are stored and versioned on the Substrate. - Training Before each Space Congress, the Substrate supports training modules for local hosts, facilitators and legal fellows at the upcoming hub.