Ask HN: Any VoIP providers that offer STIR/SHAKEN?

Currently with Voip.ms. Our outbound caller id is being marked as "Likely Spam" to cellphone users within Canada.

Voip.ms is blaming the upstream providers. The upstream providers says Voip.ms isn't using STIR/SHAKEN (to which voip.ms has confirmed. they do not have it implemented).

Does anyone know of a voip provider that offers STIR/SHAKEN with their service? We're a legitimate business operating in Toronto.