Well, that verification would be up to the public health authority who's using that information to then request proximity data from the API in order to notify people that they've been close by. The next step from that is then to move to testing. The way the API would work is that you would be notified that you had been in close proximity to someone who had been identified as infected. Then you would move to testing to verify whether or not you, in fact, had been infected by the virus.
On May 21st, 2020. See this statement in context.