Hello, this may be a long shot, but I was looking for information for retrieving 1 btc from an old Coinbase Vault account.

Back in 2015 Coinbase started the 2 of 3 multisig Vault accounts. I transferred a bitcoin into the account to test it out (had value of ~$250). I had tried to take it out of the vault, but had some weird issues with the secondary email, and eventually kind of forgot about the whole scenario.

Fast forward a few years (wow, time goes fast) and I had completely missed all of Coinbases emails involving stoppng multisig Vault support. Now I'm trying to put together whether it's possible at all for me to regain access. Coinbase I beleive deleted the key they had on their end, so it's up to me to find the other 2 and hopefully regain access. Would the 2 keys on my end be a seed and password combo?

I know when I deposited the BTC. I have some potential seeds that could contain the bitcoin, however I'm pretty sure there was also a password on top of the seed. Does anyone know if the old multisig vaults used a 12 or 24 word seed? Also, was wondering what would be the best way to go about checking the seeds, along with various password combinations for a BTC balance? Did Coinbase have any particular requirements for password length, special characters, etc? It was so long ago that my memory of the specifics is fading, but I know it has to be some variation of passwords that I used to use...

Any pointers, tips or suggestions would be GREATLY appreciated!