Reconcile how transparent statements are re-recorded on the ledger

[SteveLasker]

Line #466 states:

However, the Registrations on a separate Transparency Service is generally disjoint, though it is possible to take a Transparent Statement (i.e. a Signed Statement with a Receipt in its unprotected header, from a (see #331) from the first Transparency Service) and register it on another Transparency Service, where the second Receipt will be over the first Receipt in the unprotected header.

With the discussion and comments in #321, the unprotected header will be stripped prior to registration.

The change will make where the second Receipt will be over the first Receipt in the unprotected header inaccurate.

This issue tracks how and if we need to re-register transparent statements, or remove the above reference.