sdg:ProxiedAccessCopy as claim

sdg:ProxiedAccess is a value of sdg:accessMode for sources the browser reaches through a server relay rather than dialling the endpoint directly — the relay forwards the query and returns the result, so a source that cannot accept direct cross-origin browser requests, or that needs credentials the browser must not hold, can still be searched.Copy as claim

Not yet implemented. No relay exists yet; declaring sdg:ProxiedAccess today registers the intent but Quick Search has nothing to route the request through until the relay ships. Until then, a registered source needs sdg:DirectAccess to actually be queryable.Copy as claim