Is the event of Lord Shiv's Sharabha Avatar actually happened in Satyug or is it just a tale of local folklore?

Is the event of Lord Shiv's Sharabha Avatar actually happened in Satyug or is it just a tale of local folklore? No, it is a authentic story in Puranas. Lord Narasimha was in a great rage after killing Hiranyakashyap, he was going to destroy the universe. Lord Bhairav and Veerbhadra came to calm him but went defeated. To calm him Lord Shiva incarnated as Lord Sharabha and almost defeated Narasimha Deva, that time Hari took a more powerful form called Gandbherund. They fought fought for 18 days. At last Lord Gandbherund slayed Lord Sharabha. Then his rage was greater that any other in world just then Prahlad Maharaj came and stated Hari bhakti by putting a tilak of Narasimha’s forehead. Pleased by bhakti of Prahlad, he calm down.