# Spacechains Blindly merge-mined blockchains that enhance the [[Bitcoin]] ecosystem because despite them not having a 2-way peg mechanism, they also don't have a speculative altcoin in them. (from [[SIGHASH_ANYPREVOUT#anyprevout xyz]]) - Watch [the presentation](https://www.youtube.com/watch?v=N2ow4Q34Jeg), - read [the brief BMM explanation](https://gist.github.com/RubenSomsen/5e4be6d18e5fa526b17d8b34906b16a5), - join the [Telegram group](https://t.me/spacechains).