I have an old Bitcoin (Counterparty) wallet that I am importing past transactions. I found a Tx that has a missing output address on one API, but it shows on another. I cannot find any documentation on what the Bitcoin address prefixed with '4' means. Is this valid or just a place holder?

Tx Hash: 5288973c6e2a323a2fbc95b84fbfd18b4ed2f75895c8295db03c653ea58c70d6

Blockcypher is showing the '4' (4PTehVhW6qTNhn88DK3JPBMkXfB2wR4juB) https://api.blockcypher.com/v1/btc/main/txs/5288973c6e2a323a2fbc95b84fbfd18b4ed2f75895c8295db03c653ea58c70d6

Original API call is through Blockchain.Info https://www.blockchain.com/btc/tx/5288973c6e2a323a2fbc95b84fbfd18b4ed2f75895c8295db03c653ea58c70d6

Blockchain just says "Unable to decode output address".

This is a counterparty transaction so I am thinking it may have something to do with that. Thoughts?

2 Answers 2


I see it as multisig script on OXT


Blockchair shows it as multisig address: m-99d8dc4aa2b7f5b105fe442f651d73e6


blockstream.info shows UNKNOWN


  • Interesting. Looks like it might be a multisig counterparty wallet for the old SJCX token. Maybe a change address. Mostly find it odd that it can't be translated by most software. Not really a big deal on my end, just really curious. Thanks for the info.
    – Dan
    Oct 4, 2020 at 17:39
  • Yes it appears that it was a multisig address but format as specified by counterparty so most of the block explorers unable to read it. I have never used counterparty but these two links had some information about multisig address format: counterparty.io/docs/multisig_counterwallet counterparty.io/docs/multisig_counterparty-server
    – user103136
    Oct 4, 2020 at 17:46

These are bare multisig scripts, there is no address format for such type of output. So explorers basically came up with confusing (and constantly differents, as there is no right one) placeholders.

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