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  ],
  "notes": [
    "Coin Metrics community PriceUSD: research use, CC BY-NC 4.0; attribution required. No raw prices redistributed in the report.",
    "World Gold Council Goldhub public chart: USD/oz daily reference prices; copyright remains with source providers. No raw prices redistributed.",
    "Yahoo adjusted ETF daily prices are used for risk diagnostics and gold/BTC source cross-checks.",
    "Federal Reserve Kim-Wright data are a revisable staff research product, not a risk-free ten-year cash promise.",
    "All processing enforces the cutoff even if a source serves newer observations."
  ]
}