Question: There is a course where the students will learn the Athan with a chain of narration going back to Bilal (may Allah be Pleased with him), have you heard of this before?
Shaykh Asim al-Quryuti (may Allah Preserve him): No, by Allah - Allah's Aid is Sought.
TN: this is a course which is being offered where people are told that they can learn to call the Athan just like the way Bilal (may Allah be Pleased with him) used to call it but the claims to have a chain of narration back to him are all lies.
For a detailed response (in Arabic) please read the following article by Shaykh Abd al-Haqq Turkmani where the Shaykh exposes the chain to be full of unknown narrators: https://turkmani.com/articles/248