A meter signature is a server-side authentication/or as a source of access-level trust.
[Do not confuse with key signature, time signature.]

Because each opus has a finite ¢ent value associated with its image, only a certain number of ¢ents can be allocated to a signee (ie. juker). Such game logic (cassette+certificate+token) designation requires genuine digital validation/verification before or so that the transaction can be approved for decryption or encryption (known as securing🔐). Otherwise, a user can hypothetically create counterfeit (non-injective) assets - hijack the platform to forge proof - which is fraudulent and disallowed. (see also juke notation, coupon)

Note (+): Signatures, manifested in tutti progression, are ultimately a means for reducing rotisserie stress.

As a further control method, this data is defaulted to the ledger (as public information).
Function map: patchy-proofcassettesignatureUUelcome