{
  "tier": "free",
  "delayed_summary": {
    "cvin": "cvin:nv.rtx4070sti.pcie.16g:1ltyt2ercvp2e56f",
    "exists": true,
    "first_observed_at": "2026-11-05T07:15:06.511Z",
    "last_observed_at": "2026-11-05T07:15:06.511Z",
    "observation_count": 1,
    "obs_types": [
      "listing"
    ],
    "delayed_window_days": 90,
    "delayed_observations": 0,
    "note": "免费层只提供 90 天延迟摘要与观测计数；完整历史与连续性证明需风控订阅。"
  },
  "cvin": "cvin:nv.rtx4070sti.pcie.16g:1ltyt2ercvp2e56f",
  "exists": true,
  "scope": "device",
  "is_device": true,
  "status": "active",
  "days_since_last_observation": 0,
  "attestation_count": 0,
  "last_attested_at": null,
  "device_key_bound": false,
  "identity": {
    "level": "L0",
    "evidence_basis": "listing_fingerprint",
    "scope": "device",
    "is_device": true,
    "can_assert": "同一挂牌前后一致",
    "cannot_assert": "不保证是同一台物理设备；换平台、换 listing 就是另一个 ID",
    "cross_operator": false,
    "usable_for": [
      "市场行情",
      "价格观测",
      "型号级供给统计"
    ],
    "not_usable_for": [
      "抵押登记",
      "保险核保",
      "资产池入池",
      "任何以「这台设备」为主体的法律行为"
    ],
    "upgrade": {
      "current": "L0",
      "next": "L1",
      "how": "提交一条带序列号的证据（供应商发票 / 装箱单 / 后台导出 / RMA 工单），POST /v1/promote 完成升级",
      "note": "L0→L1 的 CVIN 会变（序列号哈希取代挂牌指纹），旧 ID 通过别名表永久指向新 ID，历史不丢"
    },
    "evidence_counts": {
      "M": 0,
      "L0": 1,
      "L1": 0,
      "L2": 0
    }
  },
  "asset": {
    "mfr": "NVIDIA",
    "model": "RTX4070STI",
    "form": "PCIe",
    "mem": "16GB"
  },
  "label": "NVIDIA RTX4070STI PCIe 16GB",
  "first_observed_at": "2026-11-05T07:15:06.511Z",
  "last_observed_at": "2026-11-05T07:15:06.511Z",
  "observation_count": 1,
  "obs_types": [
    "listing"
  ],
  "regions": [
    "Germany, DE"
  ],
  "last_obs_type": "listing",
  "last_source": "https://cloud.vast.ai/",
  "price_observation_usd_h": {
    "min": 0.1622222222222222,
    "max": 0.1622222222222222,
    "last": 0.1622222222222222,
    "n": 1
  },
  "market_quote": null,
  "chain_head": "d498db55495e19004c1b87677de9dc2bc80ae222af0deee5ad3729213e46521a",
  "sources": [
    {
      "platform": "vast.ai",
      "observations": 1,
      "attribution": "数据来源：vast.ai 公开市场 API（on-demand 挂牌快照）",
      "last_seen": "2026-11-05T07:15:06.511Z"
    }
  ],
  "declared": false,
  "synthetic_ratio": 0,
  "data_quality": {
    "observations": 1,
    "real": 1,
    "synthetic": 0,
    "test": 0,
    "demo": 0,
    "real_share_pct": 100,
    "has_real_observations": true,
    "last_real_observed_at": "2026-11-05T07:15:06.511Z",
    "classification_note": "real=公开外部来源且非合成非测试（可作引用依据）；synthetic=演示种子数据（记录层 synthetic:true）；demo=站内自产演示写入（来源域 cvin.local，派生层标记）；test=冒烟/巡检/安全测试写入（E1 只增不减原样保留）"
  },
  "declared_operators": [],
  "operator_conflict_count": 0,
  "operator_disputed": false,
  "encumbrance": {
    "known": true,
    "has_active_lien": false,
    "active_liens": 0,
    "duplicate_pledge_risk": false,
    "note": "免费层只暴露风险信号与数量；出借方名单、金额与合同编号属风控订阅（/v1/liens/{cvin}）"
  }
}