Original DeuxAns interface text, styles and monogram: independently authored for this repository. No competitor assets or source copied.
Chart implementation: Apache ECharts 6.1.0, Apache-2.0; distribution retains the installed LICENSE and NOTICE through the root release process.
Development tool: Vite 8.3.2, MIT; third-party notices remain with dependency metadata.
Data: Firsthand Bitcoin (https://firsthandbitcoin.com/data) public feed, per-feed license metadata supplied by the shared API. Commercial upstream provenance is pending independent review; no stronger license claim is made here.
Formula reference: Philip Swift, Bitcoin Investor Tool, https://www.lookintobitcoin.com/charts/bitcoin-investor-tool/. Attribution describes methodology, not affiliation.