BTC: Blocks with a Single Mining Label

Bitcoin Blocks with a Single Mining Label was 130 blocks on 7 Nov 2026 (latest daily value).

Canonical blocks with exactly one candidate mining label in the UTC period.

Why use it. See how many observed blocks receive an unambiguous label under the disclosed matching rule. How to read it. The pinned label list is applied retrospectively. Tags can be spoofed, and different labels can belong to the same operator. Read label coverage alongside these observations. A missing scalar bucket is undefined, not zero. Missing coinbase facts stop the calculation frontier; they are not classified as Unknown blocks. Read actual source coverage and clocks. Open periods remain partial; MTP closure and six later canonical blocks govern finality. The calculation describes unsmoothed observations; chart smoothing is a separate transform.

Calculation. Count each observed canonical block once when matching produces exactly one candidate. A label is attribution evidence, not verified operator identity. Match literal UTF-8 coinbase-tag bytes with ASCII-only case folding, together with the exact canonical address of coinbase output 0. One candidate gives a named label, none gives Unknown and conflicting candidates give Ambiguous. Assign complete canonical blocks to UTC hours or days using their header timestamps, retaining timestamp regressions. Use locally validated canonical coinbase facts and the pinned MIT-licensed mining-pool definitions; credits and the dataset revision remain in method details.