The presiding deity is Aadhipureeswarar is in the form of a mud mound covered by armour. On the day of the full moon of the Tamil month karthigai, the armour is removed and the representation of the god is visible to devotees. The Lord is anointed with punugu, javvadhu, and sampirani oils. There is a Durga shrine in the northern side of the temple.
Inside the main temple complex, opposite the main shrine, is Nataraja shrine and in the koshta is the Ganapati shrine. The Ganapati is known as Gunalaya Ganapati (abode of bliss) and there is also the idol of Adi Shankara, just behind the main shrine inside the complex. There are also deities like Subrahmanya installed there.
The Dakshinamurthy statue is in the northern Koshta facing south there is also the subcomplex shrine of Kali. Adi Shankara is said to have installed a chakra to calm down the Devi and to make her Sowmya roopi (calm and resplendent).
To this day, a select group of Nampoothiri families perform the pooja and aradhana to this Lord and Goddess as desired by Adi Shankara.
The name of the goddess at this temple is Vadivudaiamman alias Tripurasundari. The goddess is housed in a separate shrine inside the Temple complex. The temple with Vadivudai Amman as its chief goddess is the third of the Sakthi temple triad in the region of the Tondaimandalam, namely, Thiruvudai Amman (also known as Ichchaa Sakthi, the goddess who fulfills devotees' wishes), Vadivudai Amman (also known as Gnaana Shakti, the goddess who blesses with gnana or knowledge), and Kodiyidai Ammam (also known as Kriya Shakti, the goddess who assists in all actions). The Kodiyidai Amman shrine is at Thirumullaivoyal while the Thiruvudai Amman shrine is at Melur (Minjur).
Other deities in the temple include Agasalingam, Thiruvotrieswarar, Thiruputheeswarar (between Vattaparaiman and Durga shrines), Kuzhandhai Eesar, Kalyana Sundarar, Jaganadhar, Annamalayar, Ramanathar, Suryan, Chandran, Nalvars, Jambukeswarar, Nagalingar, Meenakshi, Sundareswarar, Sahasralingam, Amirthakandeesar, Gowlieeswarar, and Ekapaadhar, Gunalaya Vinayagar, Aruljothi Murugan, Valar Kali. The twenty seven stars of Tamil calendar are believed to have worshipped Shiva in this temple.
The inscription park at the temple has about 20 inscriptions from the time of the Chola kings installed.
Thyagaraja Cult

Somaskand image, associated with the Thyagaraja cult
Though the presiding deity of the temple is Adipuriswarar, the temple is closely associated with the Thyagaraja cult of Saivism.
Somaskanda is the iconic form of Thyagaraja and is believed to have emerged from the 10th century, the period coinciding Raja Raja Chola.
The 8th-century saint Sundarar is believed to have spread the cult from Tiruvarur to the temple here.
The Lord tricked him by making him take a vow that he would never leave Tiruvottriyur, but he breaks the promise and becomes blind.
The Lord of Tiruvottriyur and Tiruvarur are the same in terms of religious experience, but on the pilgrim tradition, Tiruvottriyur is affronted because Sundarar abandons and goes back to Tiruvarur.
The event is celebrated every year in the temple.
The seven dance forms of Thyagaraja, the Sapthavitankam, is represented in the cultic network comprising Thyagarajar Temple in Tiruvarur, Dharbaranyeswarar Temple in Tirunallar, Kayarohanaswamy Temple in Nagapattinam, Kannayariamudayar Temple in Thirukarayil, Brahmapureeswarar Temple in Thirukkuvalai, Vaimoornaathar Temple in Tiruvaimur and Vedaranyeswarar Temple in Vedaranyam.
The Tiruvottiyur temple is placed at the centre of a similar network comprising Marundeeswarar Temple in Tiruvanmiyur, Accalpuram in Sirkali and Tirukachoor near Singaperumalkoil, treated closest to the myth of Tiruvarur.
Both the Tiruvarur and Tiruvottriyur temples are believed to have the same dance poses by Shiva, as asserted by Tiruvorriyurpuranam.
The dance pattern of the temple is called Padamanatanam, a continuation of Tiruvarur temple - Vishnu is believed to have gone berserk and missed the dance at Tiruvarur, and Thyagaraja asked him to go to Tiruvottriyur where he said he promised to perform the same dance.