CryptVerifyTimeStampSignature

[DllImport("Crypt32.dll", SetLastError = true)]
public static extern bool CryptVerifyTimeStampSignature(
   byte[] pbTSContentInfo,
   byte[] pbData,
   uint cbData,
   IntPtr hAdditionalStore,
   IntPtr ppSignerCert,
   IntPtr ppTimeStampCert,
   ref IntPtr ppTSTInfo
);

Microsoft documentation: Link