The Arbitrum page of Bitcoin Layers is under development.

Arbitrum
TVL Data Coming Soon
We're currently gathering and building data infrastructure for this network. TVL analytics will be available soon.
Token Contracts Coming Soon
We're working to collect the various BTC-backed token contracts for this network. Contract addresses will be available soon.
This bridge is managed by a 9 member federation. Bitcoin users trust that 6 of the 9 members of this federation do not collude and steal user funds.
Finality is not necessarily through the lens of a validating bridge
The network is an alternative rollup. This means it uses another blockchain for data availability. From the view of its full nodes, the rollup's state is finalized after it it validates state updates published to the data availability layer. Therefore, the network's finality assurances are that of its data availability layer (assuming the node operation is permissionless). A state root may be additionally posted to the data availability layer to finalize bridge programs, but this is not a guarantee of finality. This guarantee ensures the network's bridge programs are secure and can permit withdrawals based on the network's state. This only applies to tokens that are locked in these specific's bridge programs. See the BTC custody section for more information.