Synonyms: documented
Definition: furnished with or supported by documents
Usage: the first documented case of shark attack in those waters
Similar words: referenced
Definition: supported with written references or citations
Usage: a carefully referenced biography
Similar words: registered
Definition: (of a boat or vessel) furnished with necessary official documents specifying ownership etc
Synonyms: documented, attested, authenticated
Definition: established as genuine
Definition: not fake or counterfeit
Usage: a genuine Picasso; genuine leather