Go-Kite, My understanding is that the term "verifier" is reserved for the host that is verifying the credentials of a remote TPM that is requesting to interact with that host. The "verifier" is not a third party; it is one of two parties directly involved in the interaction. On the other hand, DAA does require a third party "issuer," (see TPM Main Part/Design Principles, Specification Version 1.2, 31.1 TPM-DAA-JOIN, pg. 129 which may be found at the TCG.org website). I have not been able to find the definition of "issuer" but you seem to be quite sure of the tech here, which I readily admit that I am not so sure of. Perhaps you could provide me, and anyone else who may be interested, with the definition of "issuer" in this context?
By the way, this isn't merely an esoteric exercise. I assume that the "issuer" will charge for this service. If the "issuer" is the TPM manufacturer then any revenues from this service will probably flow to that entity. If the "issuer" is a Certifying PA (Wave e.g.)then they will receive those revenues.
Do you happen to know who the "issuer" is?
Svenm