BTC: UTXOs Aged ≥155 Days — UTXOs with Unknown Creation Price

Bitcoin UTXOs Aged ≥155 Days — UTXOs with Unknown Creation Price was 30,585 UTXOs on 7 Nov 2026 (latest daily value).

Unspent outputs without an admitted creation-day basis for spendable outputs at least 155 fixed days old.

Why use it. Identify output-count coverage omitted from known-basis valuation. How to read it. Unknown price is not a lost key or a zero price. Zero-valued outputs still count once, so zero unknown BTC need not mean zero unknown outputs. Use exact creation-header age at that snapshot: older means creation time at or before its header time minus 155×86,400 seconds; later or future-dated creations are younger. Header regressions are retained; request time does not age the stock. Read unknown-basis output counts and BTC coverage separately: count coverage and value coverage can differ. Unobserved history stays unknown; genuine source/price holds and partial/provisional/final labels remain in force.

Calculation. Count outputs whose creation-day-start quote is absent; total minus known-basis count gives this same partition. The spendable snapshot follows the highest canonical block assigned to the UTC period, including eligible coinbase/change but excluding genesis, provably unspendable outputs and BIP30 overwrite losses. Use local canonical Bitcoin outputs and undo facts with separately admitted creation-day-start BTC/USD quotes. Historical daily boundaries use retrospective previous-day closes with unknown release time and vintage; hourly quotes use recorded prospective observations. Method retains provider credits and price rights. Missing prices are never filled.