You can access Ontario birth records through various Ontario government websites or archives. Official copies of birth certificates are available from Service Ontario, according to Ontario.ca. You can obtain historical birth records through the databases of the Archives of Ontario, which falls under the Ministry of Government and Consumer Services.
Ancestry.ca, a private website, also has a database of Ontario births for the period between 1869 and 1913. Online ordering of birth certificates through Service Ontario is available only to the person himself, a parent, next of kin, or the deceased person's executor or administrator, notes Ontario.ca. An unrelated person can only order a "birth search," or a record of birth through the site.