> For the complete documentation index, see [llms.txt](https://helios-finance.gitbook.io/helios-finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helios-finance.gitbook.io/helios-finance/architecture/publish-your-docs-2.md).

# Bitcoin Settlement & Finality

Every movement of funds in Helios ultimately results in a Bitcoin transaction. Collateral deposits go into TSS vault managed addresses(by MIDL's validators) on Bitcoin; interest payments and liquidation gains are paid in BTC; and withdrawals return BTC to user wallets. This means all economic activity is transparently recorded on the Bitcoin ledger, which auditors or integrators can verify independently. There is no hidden pool or off-chain fund – if Helios says it has X BTC in the system, one can observe those UTXOs on-chain. This **full on-chain settlement** provides strong assurances of solvency and transparency: proof-of-reserves is inherent, as the total BTC locked and owed is visible. For institutions, this offers real-time auditability of funds. Helios’s design thus achieves a trifecta of *security, user experience, and transparency* by leveraging Bitcoin’s base layer for custody and finality, complemented by an overlay network for programmability.