Adding verified contact information allows you to associate a person’s image with its real owner, preventing theft for fraudulent use.
You can use a social profile or your phone number depending on the type of photo you are encoding:
For Social type: you can use (at least) one valid Social network profile (Linkedin, Facebook, Instagram, Twitter, Telegram)
For Business and Performer type: In addition to social networks, you can validate a phone number
Note: Please read the needed requirements for verify a social profile.