{
 "schema_ver": "card1",
 "card_id": "PSL-BTC-SRC-blockstream",
 "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 `blockstream` 的登记卡：角色 unclosed；判据与口径逐字见 /btc/meta/criteria.json。",
  "Source card for `blockstream`: role unclosed; judgement and caliber verbatim from /btc/meta/criteria.json."
 ],
 "labels": {},
 "citations": {
  "apa": "PSL. (2026). 源卡 blockstream [Source card blockstream]. PSL 链上计量系统. https://psl.antinel.com/btc/source/blockstream.html",
  "bibtex": "@misc{psl_btc_src_blockstream, title={源卡 blockstream}, author={PSL}, year={2026},\n howpublished={\\url{https://psl.antinel.com/btc/source/blockstream.html}},\n note={criteria_ver=c2; data as of 2026-09-19T23:58:50Z}}"
 },
 "source": "blockstream",
 "role": "unclosed",
 "verification": "unverified:未核对（许可未闭合，§5.19.9 判据二）",
 "judgement": "",
 "caliber": "块信息端点 GET /blocks/:startHeight 实测存在（每次返回 10 块，非 15），字段含 height／id／timestamp／tx_count／weight（实测，见 probe_evidence/blockstream_blocks_h967624.json）。与 mempool 同为 Esplora 系。",
 "license": "未逐字登记。robots.txt 与 ToS 均未核查。",
 "fetched_at": "2026-09-18",
 "integrity": {
  "algo": "sha256",
  "canonical": "json-sorted-compact-utf8",
  "scope": "card-self",
  "value": "488db3d23ea6ea1b65be53b651e729852411c95f7024f29425c905cf601305a9"
 }
}