isDocumentTimestamp
True for a document timestamp (/Type /DocTimeStamp, ISO 32000-2, 12.8.5). A timestamp authority signs it to prove that the document existed at a time. It names no person.
True for a document timestamp (/Type /DocTimeStamp, ISO 32000-2, 12.8.5). A timestamp authority signs it to prove that the document existed at a time. It names no person.