Can I know which transaction is signed by multi people (co-signers) by tx hash and block exlorers?
Yes, refer to this topic:
/index.php?topic=5279353.0For blockexplorers, you can use one that shows the "
SigScript" or "
ScriptSig".
Here's the same
example used by ETFbitcoin in that thread:
78c93aaa2f7fbcf08c528a0dcb691393e50446d71eef30ac5baa0183df33a5b9Scroll-down until you find "
SigScript", a MultiSig transaction's input should have two or more signatures (
the +/- 71byte string)
and the "
Redeem Script" (
the longer string) ends with "AE"
OP_CHECKMULTISIG.
If it's
OP_CHECKMULTISIGVERIFY, just refer to the signatures or use other blockexplorers.
Like this one:
78c93aaa2f7fbcf08c528a0dcb691393e50446d71eef30ac5baa0183df33a5b9Scroll-down until you find "
DETAILS +", expand it and you'll find more info there than the available on the latter.