Let's say I have wallets A,B,C. A funds multisig address with B and C. B & C show keys, get input and spent it to OP_RETURN transactions.
Is it possible?
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If this is what you are proposing:
Address A: 1Axyz...
Address B: 1Bxyz...
Address C: 1Cxyz...
Tx1
A -> Multisig requiring 1 of 2 signatures from pubkeys of B & C
Tx2
Tx1 output 0 -> OP_RETURN
Then yes, that's totally legal on the blockchain. Not sure why you would want to do it, though.
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Thanks! So here is the idea: Company B splits an "access key" which can be used to access a file from company’s http server into two parts. One part has been sent to company A using regular communication, e.g. email. We need to prove that both Company A approved to accept this request and client approved to share his file from company B to company A. – Igor Barinov Jan 26 '16 at 23:08
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Company A created and funded a wallet to accept this key. Company B and it's client both sign a transaction with part of access key in op_return. Company A knows that the client gave access for this file by signing a transaction and gets second part of the key from the blockchain transaction. – Igor Barinov Jan 26 '16 at 23:08
