[coinbase-craig]

Yes, you can sign a transaction offline using our multisig vault recovery tool, which is open source:

https://github.com/coinbase/multisig-tool

You can use it to generate a transaction payload which can be broadcast from a client of your choice, including Toshi, our open source bitcoin node:

https://toshi.io/docs/#relay-transaction

[STRML]

Excellent! Thank you for putting forth the extra effort and thinking this through. Many comparable online solutions in the Bitcoin space do not offer similar offline tools, making them a non-starter for business use.