I'm pretty sure their main product is sidechains? https://blockstream.com/about/ https://blockstream.com/about/ > Blockstream's primary area of innovation is

I'm pretty sure their main product is sidechains? https://blockstream.com/about/ https://blockstream.com/about/ > Blockstream's primary area of innovation is in sidechains, a technology invented to extend the capabilities of Bitcoin's blockchain. Sidechains create the opportunity for new models of trust, extending and improving upon the properties of Bitcoin.