Previous value: -"Signed difference between two indexed daily records. Percent change is rounded to two decimal places; source data provides a target multiplier, not a direct difficulty or energy measurement."New value: +"Paid signed deltas between real-height live/archived snapshots, including 15 J/TH power change; includes live metrics and exact archived proof bytes. Semantic discovery: Hal Finney Horizon tracker = $10,000,000 / BTC USD price; this is a valuation multiple, not a time-to-price forecast. The 15 J/TH thermodynamic energy calculation estimates watts as (network hashrate H/s / 1e12) * 15, not measured electricity. Sovereign Node RPC telemetry uses local Bitcoin Core; price and horizon are unavailable without a fiat quote."

Previous value: -[
-  {
-    "delta": {
-      "heightDelta": 144,
-      "multiplierDelta": 0.33,
-      "percentageChange": "0.26%",
-      "timeSpanDays": 1
-    },
-    "from": {
-      "date": "2026-09-08",
-      "height": 919856,
-      "target_multiplier": 125.5
-    },
-    "to": {
-      "date": "2026-09-09",
-      "height": 920000,
-      "target_multiplier": 125.83
-    }
-  }
-]New value: +[
+  {
+    "archive_state": "available",
+    "delta": {
+      "energyWattsDelta": 14000000000,
+      "heightDelta": 100,
+      "multiplierDelta": -1,
+      "percentageChange": "-0.79%",
+      "timeSpanDays": 1
+    },
+    "from": {
+      "date": "2026-10-12T00:00:00+00:00",
+      "height": 919900,
+      "network_energy_watts": 1000000000,
+      "target_multiplier": 126
+    },
+    "historical_proofs": [
+      {
+        "bundle_download_url": "/agent-api/historical-proof/2026-10-12/download",
+        "date": "2026-10-12",
+        "ots_download_url": "/agent-api/historical-proof/2026-10-12/ots",
+        "ots_filename": "snapshot_2026-10-12.json.ots",
+        "ots_proof_base64": "AQID",
+        "ots_sha256": "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd",
+        "proof_status": "bitcoin_attestation_present_unverified",
+        "snapshot_download_url": "/agent-api/historical-proof/2026-10-12/snapshot",
+        "snapshot_filename": "snapshot_2026-10-12.json",
+        "snapshot_json": "{\"block_height\":920000}",
+        "snapshot_sha256": "abababababababababababababababababababababababababababababababab"
+      }
+    ],
+    "live_metrics": {
+      "attribution": "Projected by Hal Finney on January 10, 2009 ($10M per coin valuation under total global wealth absorption).",
+      "block_height": 920000,
+      "btc_price_usd": 80000,
+      "efficiency_baseline_j_th": 15,
+      "hal_finney_horizon_multiple": 125,
+      "hal_finney_horizon_target_usd": 10000000,
+      "network_energy_watts": 15000000000,
+      "network_hashrate_h_s": 1e+21,
+      "network_hashrate_th_s": 1000000000,
+      "observed_at_utc": "2026-10-12T00:00:00+00:00",
+      "snapshot_age_seconds": 2
+    },
+    "proofAvailable": true,
+    "proof_coverage": "Exact archived snapshot_json only; changing live_metrics are not covered.",
+    "to": {
+      "date": "2026-10-12T00:00:00+00:00",
+      "height": 920000,
+      "network_energy_watts": 15000000000,
+      "target_multiplier": 125
+    }
+  }
+]

Added value: +{
+  "description": "available or no_archives; no synthetic receipt is created.",
+  "example": "available",
+  "examples": [
+    "available"
+  ],
+  "type": "string"
+}

Removed value: -false

Previous value: -"Signed change from the starting indexed entry to the ending entry."New value: +"Signed arithmetic deltas; watts derive from the assumed 15 J/TH baseline."

Previous value: -[
-  {
-    "heightDelta": 144,
-    "multiplierDelta": 0.33,
-    "percentageChange": "0.26%",
-    "timeSpanDays": 1
-  }
-]New value: +[
+  {
+    "heightDelta": 100
+  }
+]

Removed value: -{
-  "heightDelta": {
-    "description": "Ending indexed height minus starting indexed height. Example: 144.",
-    "example": 144,
-    "examples": [
-      144
-    ],
-    "type": "integer"
-  },
-  "multiplierDelta": {
-    "description": "Ending stored target multiplier minus starting multiplier. Example: 0.33.",
-    "example": 0.33,
-    "examples": [
-      0.33
-    ],
-    "type": "number"
-  },
-  "percentageChange": {
-    "description": "Multiplier change divided by starting multiplier, formatted as a percentage to two decimal places. Example: \"0.26%\".",
-    "example": "0.26%",
-    "examples": [
-      "0.26%"
-    ],
-    "type": "string"
-  },
-  "timeSpanDays": {
-    "description": "Signed number of UTC calendar days between indexed dates. Example: 1.",
-    "example": 1,
-    "examples": [
-      1
-    ],
-    "type": "integer"
-  }
-}

Removed value: -[
-  "heightDelta",
-  "multiplierDelta",
-  "percentageChange",
-  "timeSpanDays"
-]

Removed value: -false

Previous value: -"One indexed daily stratum; the height is a deterministic dataset index, not a live Bitcoin block height."New value: +"Real captured from-target values."

Previous value: -[
-  {
-    "date": "2026-09-08",
-    "height": 919856,
-    "target_multiplier": 125.5
-  }
-]New value: +[
+  {
+    "height": 919900
+  }
+]

Removed value: -{
-  "date": {
-    "description": "Indexed UTC calendar date. Constraints: format: date. Example: \"2026-09-08\".",
-    "example": "2026-09-08",
-    "examples": [
-      "2026-09-08"
-    ],
-    "format": "date",
-    "type": "string"
-  },
-  "height": {
-    "description": "Deterministic indexed height for the dataset day. Example: 919856.",
-    "example": 919856,
-    "examples": [
-      919856
-    ],
-    "type": "integer"
-  },
-  "target_multiplier": {
-    "description": "Stored target multiplier; not a measured energy quantity. Example: 125.5.",
-    "example": 125.5,
-    "examples": [
-      125.5
-    ],
-    "type": "number"
-  }
-}

Removed value: -[
-  "height",
-  "date",
-  "target_multiplier"
-]

Added value: +{
+  "description": "All archived snapshots returned by this call, or latest available archive for a live-only result.",
+  "examples": [
+    [
+      {
+        "bundle_download_url": "/agent-api/historical-proof/2026-10-12/download",
+        "date": "2026-10-12",
+        "ots_download_url": "/agent-api/historical-proof/2026-10-12/ots",
+        "ots_filename": "snapshot_2026-10-12.json.ots",
+        "ots_proof_base64": "AQID",
+        "ots_sha256": "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd",
+        "proof_status": "bitcoin_attestation_present_unverified",
+        "snapshot_download_url": "/agent-api/historical-proof/2026-10-12/snapshot",
+        "snapshot_filename": "snapshot_2026-10-12.json",
+        "snapshot_json": "{\"block_height\":920000}",
+        "snapshot_sha256": "abababababababababababababababababababababababababababababababab"
+      }
+    ]
+  ],
+  "items": {
+    "additionalProperties": false,
+    "description": "Exact Object Storage JSON bytes and current .ots bytes, including in-place Bitcoin upgrades; proof binds snapshot_json, never changing live_metrics.",
+    "examples": [
+      {
+        "bundle_download_url": "/agent-api/historical-proof/2026-10-12/download",
+        "date": "2026-10-12",
+        "ots_download_url": "/agent-api/historical-proof/2026-10-12/ots",
+        "ots_filename": "snapshot_2026-10-12.json.ots",
+        "ots_proof_base64": "AQID",
+        "ots_sha256": "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd",
+        "proof_status": "bitcoin_attestation_present_unverified",
+        "snapshot_download_url": "/agent-api/historical-proof/2026-10-12/snapshot",
+        "snapshot_filename": "snapshot_2026-10-12.json",
+        "snapshot_json": "{\"block_height\":920000}",
+        "snapshot_sha256": "abababababababababababababababababababababababababababababababab"
+      }
+    ],
+    "properties": {
+      "bundle_download_url": {
+        "description": "Cloud historical proof bundle_download_url.",
+        "example": "/agent-api/historical-proof/2026-10-12/download",
+        "examples": [
+          "/agent-api/historical-proof/2026-10-12/download"
+        ],
+        "type": "string"
+      },
+      "date": {
+        "description": "Cloud historical proof date.",
+        "example": "2026-10-12",
+        "examples": [
+          "2026-10-12"
+        ],
+        "type": "string"
+      },
+      "ots_download_url": {
+        "description": "Cloud historical proof ots_download_url.",
+        "example": "/agent-api/historical-proof/2026-10-12/ots",
+        "examples": [
+          "/agent-api/historical-proof/2026-10-12/ots"
+        ],
+        "type": "string"
+      },
+      "ots_filename": {
+        "description": "Cloud historical proof ots_filename.",
+        "example": "snapshot_2026-10-12.json.ots",
+        "examples": [
+          "snapshot_2026-10-12.json.ots"
+        ],
+        "type": "string"
+      },
+      "ots_proof_base64": {
+        "description": "Cloud historical proof ots_proof_base64.",
+        "example": "AQID",
+        "examples": [
+          "AQID"
+        ],
+        "type": "string"
+      },
+      "ots_sha256": {
+        "description": "Cloud historical proof ots_sha256.",
+        "example": "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd",
+        "examples": [
+          "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd"
+        ],
+        "type": "string"
+      },
+      "proof_status": {
+        "description": "Cloud historical proof proof_status.",
+        "example": "bitcoin_attestation_present_unverified",
+        "examples": [
+          "bitcoin_attestation_present_unverified"
+        ],
+        "type": "string"
+      },
+      "snapshot_download_url": {
+        "description": "Cloud historical proof snapshot_download_url.",
+        "example": "/agent-api/historical-proof/2026-10-12/snapshot",
+        "examples": [
+          "/agent-api/historical-proof/2026-10-12/snapshot"
+        ],
+        "type": "string"
+      },
+      "snapshot_filename": {
+        "description": "Cloud historical proof snapshot_filename.",
+        "example": "snapshot_2026-10-12.json",
+        "examples": [
+          "snapshot_2026-10-12.json"
+        ],
+        "type": "string"
+      },
+      "snapshot_json": {
+        "description": "Cloud historical proof snapshot_json.",
+        "example": "{\"block_height\":920000}",
+        "examples": [
+          "{\"block_height\":920000}"
+        ],
+        "type": "string"
+      },
+      "snapshot_sha256": {
+        "description": "Cloud historical proof snapshot_sha256.",
+        "example": "abababababababababababababababababababababababababababababababab",
+        "examples": [
+          "abababababababababababababababababababababababababababababababab"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "date",
+      "snapshot_filename",
+      "ots_filename",
+      "snapshot_json",
+      "snapshot_sha256",
+      "ots_sha256",
+      "ots_proof_base64",
+      "proof_status",
+      "snapshot_download_url",
+      "ots_download_url",
+      "bundle_download_url"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

Added value: +{
+  "additionalProperties": true,
+  "description": "Hal Finney Horizon tracker and 15 J/TH thermodynamic energy calculation. Horizon = $10,000,000 / btc_price_usd (a price multiple, not a forecast). Estimated network power in watts = (network_hashrate_h_s / 1e12) * 15. Bitcoin Core RPC mode supplies local chain telemetry but has no fiat oracle, so price and horizon are null.",
+  "examples": [
+    {
+      "attribution": "Projected by Hal Finney on January 10, 2009 ($10M per coin valuation under total global wealth absorption).",
+      "block_height": 920000,
+      "btc_price_usd": 80000,
+      "efficiency_baseline_j_th": 15,
+      "hal_finney_horizon_multiple": 125,
+      "hal_finney_horizon_target_usd": 10000000,
+      "network_energy_watts": 15000000000,
+      "network_hashrate_h_s": 1e+21,
+      "network_hashrate_th_s": 1000000000,
+      "observed_at_utc": "2026-10-12T00:00:00+00:00",
+      "snapshot_age_seconds": 2
+    }
+  ],
+  "properties": {
+    "attribution": {
+      "description": "Current pipeline attribution; not a value reconstructed from the historical video index.",
+      "example": "Projected by Hal Finney on January 10, 2009 ($10M per coin valuation under total global wealth absorption).",
+      "examples": [
+        "Projected by Hal Finney on January 10, 2009 ($10M per coin valuation under total global wealth absorption)."
+      ],
+      "type": "string"
+    },
+    "block_height": {
+      "description": "Current pipeline block_height; not a value reconstructed from the historical video index.",
+      "example": 920000,
+      "examples": [
+        920000
+      ],
+      "type": "number"
+    },
+    "btc_price_usd": {
+      "description": "Current pipeline btc_price_usd; not a value reconstructed from the historical video index.",
+      "example": 80000,
+      "examples": [
+        80000
+      ],
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "efficiency_baseline_j_th": {
+      "description": "Current pipeline efficiency_baseline_j_th; not a value reconstructed from the historical video index.",
+      "example": 15,
+      "examples": [
+        15
+      ],
+      "type": "number"
+    },
+    "hal_finney_horizon_multiple": {
+      "description": "Current pipeline hal_finney_horizon_multiple; not a value reconstructed from the historical video index.",
+      "example": 125,
+      "examples": [
+        125
+      ],
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "hal_finney_horizon_target_usd": {
+      "description": "Current pipeline hal_finney_horizon_target_usd; not a value reconstructed from the historical video index.",
+      "example": 10000000,
+      "examples": [
+        10000000
+      ],
+      "type": "number"
+    },
+    "network_energy_watts": {
+      "description": "Current pipeline network_energy_watts; not a value reconstructed from the historical video index.",
+      "example": 15000000000,
+      "examples": [
+        15000000000
+      ],
+      "type": "number"
+    },
+    "network_hashrate_h_s": {
+      "description": "Current pipeline network_hashrate_h_s; not a value reconstructed from the historical video index.",
+      "example": 1e+21,
+      "examples": [
+        1e+21
+      ],
+      "type": "number"
+    },
+    "network_hashrate_th_s": {
+      "description": "Current pipeline network_hashrate_th_s; not a value reconstructed from the historical video index.",
+      "example": 1000000000,
+      "examples": [
+        1000000000
+      ],
+      "type": "number"
+    },
+    "observed_at_utc": {
+      "description": "Current pipeline observed_at_utc; not a value reconstructed from the historical video index.",
+      "example": "2026-10-12T00:00:00+00:00",
+      "examples": [
+        "2026-10-12T00:00:00+00:00"
+      ],
+      "type": "string"
+    },
+    "snapshot_age_seconds": {
+      "description": "Current pipeline snapshot_age_seconds; not a value reconstructed from the historical video index.",
+      "example": 2,
+      "examples": [
+        2
+      ],
+      "type": "number"
+    }
+  },
+  "required": [
+    "block_height",
+    "observed_at_utc",
+    "btc_price_usd",
+    "hal_finney_horizon_target_usd",
+    "hal_finney_horizon_multiple",
+    "attribution",
+    "network_hashrate_h_s",
+    "network_hashrate_th_s",
+    "network_energy_watts",
+    "efficiency_baseline_j_th",
+    "snapshot_age_seconds"
+  ],
+  "type": "object"
+}

Added value: +{
+  "description": "True only if an archived JSON/OTS pair was returned.",
+  "example": true,
+  "examples": [
+    true
+  ],
+  "type": "boolean"
+}

Added value: +{
+  "description": "Only exact archived JSON is covered by each receipt, never live metrics.",
+  "example": "Exact archived snapshot_json only; changing live_metrics are not covered.",
+  "examples": [
+    "Exact archived snapshot_json only; changing live_metrics are not covered."
+  ],
+  "type": "string"
+}

Removed value: -false

Previous value: -"One indexed daily stratum; the height is a deterministic dataset index, not a live Bitcoin block height."New value: +"Real captured to-target values."

Previous value: -[
-  {
-    "date": "2026-09-08",
-    "height": 919856,
-    "target_multiplier": 125.5
-  }
-]New value: +[
+  {
+    "height": 920000
+  }
+]

Removed value: -{
-  "date": {
-    "description": "Indexed UTC calendar date. Constraints: format: date. Example: \"2026-09-08\".",
-    "example": "2026-09-08",
-    "examples": [
-      "2026-09-08"
-    ],
-    "format": "date",
-    "type": "string"
-  },
-  "height": {
-    "description": "Deterministic indexed height for the dataset day. Example: 919856.",
-    "example": 919856,
-    "examples": [
-      919856
-    ],
-    "type": "integer"
-  },
-  "target_multiplier": {
-    "description": "Stored target multiplier; not a measured energy quantity. Example: 125.5.",
-    "example": 125.5,
-    "examples": [
-      125.5
-    ],
-    "type": "number"
-  }
-}

Removed value: -[
-  "height",
-  "date",
-  "target_multiplier"
-]

Previous value: -[
-  "from",
-  "to",
-  "delta"
-]New value: +[
+  "from",
+  "to",
+  "delta",
+  "live_metrics",
+  "historical_proofs",
+  "proofAvailable",
+  "archive_state",
+  "proof_coverage"
+]