Hello,

I am currently thinking about implementing a multisignature scheme for an organisation and I would greatly appreciate any help regarding the following two topics:

A- Ex-post accountability
Assuming a signed transaction has been broadcast to the network and that I know the redeem script and all signatory public keys, can I determine which public keys were signatories of the transaction?

B- Signatory groups
Is there a way to implement a signing scheme such as (key1 or key 2 or key 3) AND (key 4 or key 5) AND (key 6 or key 7)

the idea would be to have a scheme such as (Trader 1 or Trader 2 or Trader 3) AND (Accountant 1 or Accountant 2) AND (BOSS 1 or BOSS 2)

I indeed read that OP_AND and OP_OR have been disabled.


Thank you,