The High Commissioner for Human Rights is the principal human rights official of the United Nations.
The Office of the High Commissioner for Human Rights is the leading United Nations entity on human rights. They represent the world’s commitment to the promotion and protection of the full range of human rights and freedoms set out in the Universal Declaration of Human Rights.
The OHCHR provides also details on the basics of human rights.
You can find out more about the UN Human Rights Office of the High Commissioner here.