You can roster Otus via ClassLink's OneRoster API by following the steps outlined below.
Step 1: Within Roster Server, click on Apps then click on + ADD.
Step 2: In the NAME search box, enter Otus. Click the blue + Add for the Otus entry.
Step 3: Select Full Permissions and then click on Return to Apps.
Step 4: On the applications (Apps) page, search for Otus and toggle the Disabled button to Enabled.
To share demographics (gender, race/ethnicity), click on the Gear under Actions.
Step 5: Click on Shared Fields and then select Demographics and check the Enable Demographics box and click on Save.
Once you've added Otus as an application and enabled demographics, let your Otus Integration Specialist know and they'll finalize the rostering process.