apograph

jäljennös puhekieltä A copy or transcript of a manuscript (called the antigraph).
1962, w:Vladimir Nabokov|Vladimir Nabokov, w:Pale Fire|Pale Fire:

Moreover, this is not a holograph but an apograph, made by a scribe for the printers – you will note that both mayors write the same hand.

For both C and R, as well as for all other corpora of Slavic manuscripts, including I and L, it has always been tacitly assumed that the scribe did not merely copy, but verified the text of his apograph via his own pronunciation (externally or internally), or even wrote upon dictation.