{
  "schema": "bsahi.contribution-ratio/1",
  "layer": "modelled",
  "generated_at": "2026-09-24T04:08:13.762304+00:00",
  "source": "join of node_geography.json + block_propagation.json + mining_geography.json + verification_population.json + pool_attribution_validation.json",
  "caveat": "These are THREE populations, not one. A single 'public vs private contribution ratio on blocks' is not defined: blocks are PRODUCED by miners, RELAYED by nodes (public and private alike), and the private/non-listening node share is unobservable. Read the axes separately.",
  "axis_1_verification_population": {
    "available": true,
    "grade": "B (floor)",
    "reachable_nodes": 26258,
    "overlay_pct": 65.63,
    "tor_pct": 48.24,
    "clearnet_lower_bound": 3362,
    "region_counts": {
      "North America": 1593,
      "Europe": 1260,
      "Asia": 205,
      "Oceania": 100,
      "South America": 73,
      "Africa": 21,
      "Other/unknown": 11
    },
    "unobservable": "non-listening / NAT'd nodes \u2014 no crawler can see them; floor only",
    "observability_tiers": {
      "A_gossip_addresses": 53321,
      "B_reachable_nodes": 26586,
      "C_non_listening": "unobservable",
      "D_total": "unobservable"
    }
  },
  "axis_2_block_relay": {
    "available": true,
    "grade": "C (pinger sample of listening peers)",
    "blocks_in_window": 50,
    "announcing_nodes_min": 1,
    "announcing_nodes_mean": 68.88,
    "announcing_nodes_max": 265,
    "not_the_producer": "announcing peers != the miner that produced the block"
  },
  "axis_3_block_production": {
    "available": true,
    "grade": "C/D (CBECI estimate, ~32-38% pool sample)",
    "period": "Q3 2026",
    "top_countries": [
      [
        "United States",
        36.7
      ],
      [
        "Russia",
        17.2
      ],
      [
        "China",
        12.2
      ],
      [
        "Paraguay",
        4.7
      ],
      [
        "United Arab Emirates",
        3.0
      ],
      [
        "Oman",
        2.8
      ],
      [
        "Canada",
        2.6
      ],
      [
        "Ethiopia",
        2.4
      ],
      [
        "Indonesia",
        1.8
      ],
      [
        "Norway",
        1.7
      ]
    ],
    "pool_attribution_status": "Validation vs reachable independent evidence; self-reported pool hashrate UNAVAILABLE (documented) -- see research/pool-hashrate-reachability.md",
    "network_hashrate_ehs": 1013.7
  }
}