HPDFBuildHeadlessTimestampRequest

function HPDFBuildHeadlessTimestampRequest(const SignatureValue: SysUtils.TBytes;
  const Options: THPDFHeadlessTimestampOptions): SysUtils.TBytes;

Returns a bounded DER RFC3161 TimeStampReq with SHA-256 of the supplied signature octets, a fresh 16-byte cryptographic nonce, and certReq enabled

Pass the original request to HPDFVerifyHeadlessTimestampResponse so nonce and imprint checks use the same request

See Native RFC3161 timestamps for transport and trust configuration