The version of `teiphy` as submitted to the _Journal of Open Source Software_. Changes since the initial release include support for `origDate` elements containing chronological data under `witness` elements (current only used for conversion to STEMMA format); the addition of a `to_distance_matrix` method that returns a NumPy matrix of distances between witnesses; system tests to ensure that outputs for IQTREE, MrBayes, and STEMMA are validated by their respective programs; and further revisions to the paper and documentation.