One Time Registration - National Scholarship Portal 1. The NSP OTR App is for students to complete One Time Registration (OTR) on the National Scholarship Portal. This application uses Aadhaar Face RD Services to authenticate user from UIDAI. 2. External biometric devices are not required to perform face-authentication. 3. User can download Aadhaar Face RD from Google Play Store; Search for AadhaarFaceRD in Google Play Store."