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Some details that are not clear to me:
1. If I am a third-party (i did not participate in the creation of the multisig address or with any of the transactions or the redeem script) and I look at the blockchain and find a multisig address, will I be able to know which Bitcoin addresses were used to create the multisig address?
2. If I am a third-party (same conditions as above) and I look at the blockchain, I see a confirmed transaction where a multisig address was used to send BTC to some other address, will I be able to know which of the individual Bitcoin addresses used in the creation of the multisig address actually SIGNED the transaction? i.e., if Addresses #1, #2, and 3# were used to create MultiSigAddress #1 (2 of 3 signatures required). Will I be able to know if for #1 and #3 signed the transaction (and that #2 did not participate)?
1. If I am a third-party (i did not participate in the creation of the multisig address or with any of the transactions or the redeem script) and I look at the blockchain and find a multisig address, will I be able to know which Bitcoin addresses were used to create the multisig address?
2. If I am a third-party (same conditions as above) and I look at the blockchain, I see a confirmed transaction where a multisig address was used to send BTC to some other address, will I be able to know which of the individual Bitcoin addresses used in the creation of the multisig address actually SIGNED the transaction? i.e., if Addresses #1, #2, and 3# were used to create MultiSigAddress #1 (2 of 3 signatures required). Will I be able to know if for #1 and #3 signed the transaction (and that #2 did not participate)?
Regardless of your involvement in creating a P2SH address, you can find which all addresses are needed to sign transaction if that multisig address has send Bitcoins from it. When sending Bitcoins, the redeemScript is included in the transaction. When you have a redeemScript, you can either break it down and find the public keys manually or you can use https://coinb.in/#verify.
Read http://www.soroushjp.com/2014/12/20/bitcoin-multisig-the-hard-way-understanding-raw-multisignature-bitcoin-transactions.
yeah, thanks! And when sending Bitcoins, the redeemScript will show that #1 and #3 signed the transaction, and that #2 did not participate right? (just double checking)
