{
 "schema_ver": "card1",
 "card_id": "PSL-BTC-SRC-mempool_space",
 "card_type": "source",
 "criteria_ver": "c2",
 "legend_ver": "lg1",
 "published_at": "2026-09-22T06:24:34Z",
 "observed_at_max": "2026-09-19T23:58:50Z",
 "staleness_days": 2,
 "citing_allowed": true,
 "matrix": {
  "rows": [],
  "cols": [],
  "cells": []
 },
 "quotable": [
  "源 `mempool_space` 的登记卡：角色 unclosed；判据与口径逐字见 /btc/meta/criteria.json。",
  "Source card for `mempool_space`: role unclosed; judgement and caliber verbatim from /btc/meta/criteria.json."
 ],
 "labels": {},
 "citations": {
  "apa": "PSL. (2026). 源卡 mempool_space [Source card mempool_space]. PSL 链上计量系统. https://psl.antinel.com/btc/source/mempool_space.html",
  "bibtex": "@misc{psl_btc_src_mempool_space, title={源卡 mempool_space}, author={PSL}, year={2026},\n howpublished={\\url{https://psl.antinel.com/btc/source/mempool_space.html}},\n note={criteria_ver=c2; data as of 2026-09-19T23:58:50Z}}"
 },
 "source": "mempool_space",
 "role": "unclosed",
 "verification": "unverified:未核对（该源与本方复算同源，§5.4 标「同源标注」，不构成独立验证）",
 "judgement": "",
 "caliber": "块信息端点 GET /api/v1/blocks/:startHeight 一次返回该高度及之前 15 块，字段含 height／id／timestamp／tx_count／weight（实测，见 probe_evidence/mempool_v1_blocks_h967624.json）。tx_count 为块体交易条数（含 coinbase）。",
 "license": "未逐字登记。实测 robots.txt 不存在（请求 https://mempool.space/robots.txt 返回 200 但内容为该站 SPA 首页 HTML，非 robots 文件）⇒ 无 robots 声明；ToS 未核查。",
 "fetched_at": "2026-09-18",
 "integrity": {
  "algo": "sha256",
  "canonical": "json-sorted-compact-utf8",
  "scope": "card-self",
  "value": "989336bd02f1e1e76eff629f92039822f00075830b6047aaeb75b2534ae68531"
 }
}