> What is the root of trust of Stacks? Does it have auto-update? If I take over your domain, can I take all Stacks?
Root of trust is the history of cryptographic sortitions in the Bitcoin chain (again, see SIP-001). The chain can soft-fork to upgrade -- a direct and desirable consequence of Clarity being a decidable programming language. If you want to attack the chain, you'll need to mine a longer Stacks chain (or attack Bitcoin).
> How can I independently verify how many mainnet coins have been locked as Stacks? How do I run a testnet node?
This is all described in SIP-001 (https://github.com/stacksgov/sips/blob/main/sips/sip-001/sip...).
> How many nodes are there?
Here's a sample: http://seed-0.mainnet.stacks.co:20443/v2/neighbors
> What is the root of trust of Stacks? Does it have auto-update? If I take over your domain, can I take all Stacks?
Root of trust is the history of cryptographic sortitions in the Bitcoin chain (again, see SIP-001). The chain can soft-fork to upgrade -- a direct and desirable consequence of Clarity being a decidable programming language. If you want to attack the chain, you'll need to mine a longer Stacks chain (or attack Bitcoin).
> How can I independently verify how many mainnet coins have been locked as Stacks? How do I run a testnet node?
See docs.blockstack.org