<p>The daily on-chain holdings, in <a href="https://www.theblock.co/price/248348/bitcoin-btc-usd">BTC</a> and USD, for <a href="https://www.theblock.co/bitcoin-etf-live-chart/308808/fidelity-wise-origin-bitcoin-fund-fbtc">Fidelity's spot bitcoin ETF (FBTC)</a> with known on-chain addresses.</p>