Is it permissible to bring witnesses to confirm the date of revival of land purchased by the questioner, for which he possesses a bill of sale, in order to extract a formal deed, knowing that there is no harm in doing so?

Bearing false witness is forbidden, and its prohibition is not mitigated by the absence of harm to anyone. Rather, it is forbidden even if it is to establish a right. Embezzlement, treachery, false witness, and lying are absolutely forbidden, even if the intention is to reach the truth.