You can find verified versions of the mantra in Odia script through the following resources: Scribd - Paita Mantra in Odia (Oriya)
Finding a "verified" PDF is crucial because errors in Vedic mantras can change the meaning. Many generic websites host auto-generated content that contains spelling errors in Odia script.
This is widely considered one of the most authentic online repositories for Odia Vedic literature.
Below, I have written a story that weaves in the tradition and meaning of the Upanayana (Paita) ceremony. Following that, I have provided guidance on how to find verified liturgical texts. The Sacred Knot: A Story of the Paita Mantra