Evidence row 303421

What was observed

{
  "count": 7,
  "tools": [
    {
      "description": "What Indonesian dealers pay today to buy back ONE gold bar of a given brand and weight, in rupiah: the highest price that fits every bar of that brand and size, prices that fit only some bars (for example Antam made in 2026), each with dealer and day, and a world-gold-price estimate when no dealer FiLot reads prices the brand. Brands with dealer prices: Antam (Logam Mulia), UBS, Lotus Archi, Galeri 24, Sampoerna; any other brand (King Halim, PAMP, Argor-Heraeus, ...) gets the estimate and Galeri 24's Sentra Buyback line.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "brand": {
            "description": "Brand stamped on the bar, e.g. Antam, UBS, Lotus Archi, Galeri 24, Sampoerna, King Halim, PAMP.",
            "maxLength": 40,
            "type": "string"
          },
          "grams": {
            "description": "Weight of ONE bar in grams (1 troy ounce = 31.1 g; 1 kg = 1000).",
            "maximum": 12500,
            "minimum": 0.1,
            "type": "number"
          },
          "lang": {
            "description": "Answer language: id = Bahasa Indonesia, en = English (default).",
            "enum": [
              "id",
              "en"
            ],
            "type": "string"
          }
        },
        "required": [
          "brand",
          "grams"
        ],
        "type": "object"
      },
      "name": "gold_buyback_prices"
    },
    {
      "description": "The gold price on a past date, for records such as a tax return, an inheritance or a purchase: the world price of fine gold in any currency (FiLot's own daily record, kept since 22 Oct 2026: the day's last reading) and, for Indonesia, the dealers' Antam buyback price that day (stored since 25 Sep 2026). Signed, with a link to check it. A record of the price, not advice.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "currency": {
            "description": "Three-letter currency code for the world price. Default USD.",
            "pattern": "^[A-Za-z]{3}$",
            "type": "string"
          },
          "date": {
            "description": "The day (YYYY-MM-DD, Jakarta date).",
            "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
            "type": "string"
          },
          "lang": {
            "description": "Answer language: id = Bahasa Indonesia, en = English (default).",
            "enum": [
              "id",
              "en"
            ],
            "type": "string"
          }
        },
        "required": [
          "date"
        ],
        "type": "object"
      },
      "name": "gold_price_on_date"
    },
    {
      "description": "Which Indonesian dealer websites FiLot reads (3 times a day), the products, and the latest price day of each.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "gold_price_sources"
    },
    {
      "description": "Work out zakat (zakat al-mal) on a person's gold: nisab 85 grams of pure gold (or the 595 g silver nisab if their scholars use it), rate 2.5%, due once the gold has been owned one hijri year (haul). Indonesia: valued at the latest Antam buyback price; elsewhere: the world gold price in the person's currency. Takes several items with their karat or fineness; worn jewellery is shown both ways unless the person says which view they follow (Hanafi counts it; Shafi'i, Maliki and Hanbali generally do not); an optional haul start date. A general calculation, not a fatwa. Nothing is stored and no receipt is kept.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "country": {
            "description": "Two-letter country code. ID values gold at the Antam buyback price.",
            "pattern": "^[A-Za-z]{2}$",
            "type": "string"
          },
          "currency": {
            "description": "Three-letter currency code. Default IDR in Indonesia, else USD.",
            "pattern": "^[A-Za-z]{3}$",
            "type": "string"
          },
          "haul_start_date": {
            "description": "When the person's gold first reached the nisab (YYYY-MM-DD), if known.",
            "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
            "type": "string"
          },
          "items": {
            "description": "The gold, one entry per item or per group of the same kind.",
            "items": {
              "additionalProperties": false,
              "properties": {
                "fineness": {
                  "description": "Fineness in parts per thousand, e.g. 999.9 or 750. Overrides karat. Bars without it count as 999.9.",
                  "exclusiveMinimum": 0,
                  "maximum": 1000,
                  "type": "number"
                },
                "form": {
                  "description": "bar (default), jewellery, or other.",
                  "enum": [
                    "bar",
                    "jewellery",
                    "other"
                  ],
                  "type": "string"
                },
                "grams": {
                  "description": "Weight in grams (the whole item).",
                  "exclusiveMinimum": 0,
                  "maximum": 1000000,
                  "type": "number"
                },
                "karat": {
                  "description": "Karat. Required for jewellery unless fineness is given.",
                  "enum": [
                    24,
                    22,
                    21,
                    20,
                    18,
                    14,
                    10,
                    9
                  ],
                  "type": "integer"
                },
                "worn": {
                  "description": "Jewellery that is regularly worn. Default false.",
                  "type": "boolean"
                }
              },
              "required": [
                "grams"
              ],
              "type": "object"
            },
            "maxItems": 20,
            "minItems": 1,
            "type": "array"
          },
          "lang": {
            "description": "Answer language: id = Bahasa Indonesia, en = English (default).",
            "enum": [
              "id",
              "en"
            ],
            "type": "string"
          },
          "nisab": {
            "description": "Which nisab: gold (85 g, default) or silver (595 g).",
            "enum": [
              "gold",
              "silver"
            ],
            "type": "string"
          },
          "worn_jewellery": {
            "description": "The view the person follows on worn jewellery. Default show_both.",
            "enum": [
              "show_both",
              "exempt",
              "zakatable"
            ],
            "type": "string"
          }
        },
        "required": [
          "items"
        ],
        "type": "object"
      },
      "name": "gold_zakat"
    },
    {
      "description": "Indonesian tax facts for physical gold bars: VAT (PPN), income tax (PPh 22) when buying, what applies to individual buyers, selling back, the Rp 10 million limit, stamp duty, and Antam's own buyback deduction. Source: BULI2, a gold bar supplier (FiLot's sister company), not yet reviewed by a tax consultant. General information, not tax advice.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "lang": {
            "description": "Answer language: id = Bahasa Indonesia, en = English (default).",
            "enum": [
              "id",
              "en"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "indonesian_gold_tax"
    },
    {
      "description": "Checks a FiLot gold bar record against the public Solana blockchain, from the owner's share link (https://filot.me/verify#p=...) or a delivery's check link (https://filot.me/delivery#c=...). A serial number alone is never checked. It verifies the record, not the metal.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "link": {
            "description": "The FiLot share link or delivery link exactly as given by the owner or printed on the delivery papers.",
            "maxLength": 8000,
            "type": "string"
          }
        },
        "required": [
          "link"
        ],
        "type": "object"
      },
      "name": "verify_gold_bar_record"
    },
    {
      "description": "Today's world (spot) gold price for one gram, one troy ounce and one kilogram of fine gold, in the currency asked for (a three-letter code such as USD, EUR, SGD, AUD, GBP, MYR or IDR), with the time it was read. Built from the gold price in US dollars (gold-api.com) and that day's exchange rate (open.er-api.com). A world-market indication, not what any dealer pays or charges.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "currency": {
            "description": "Three-letter currency code (ISO 4217), e.g. USD, EUR, SGD, AUD, GBP, IDR. Default USD.",
            "pattern": "^[A-Za-z]{3}$",
            "type": "string"
          },
          "lang": {
            "description": "Answer language: id = Bahasa Indonesia, en = English (default).",
            "enum": [
              "id",
              "en"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "world_gold_price"
    }
  ]
}

What the leaf hashes

{"body":"bb7c82f5c1ea3cb430b412d9ea02865f7f8fd0004d3cc171749a86e5eef4e486","id":303421,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793055331521251,"prev":null,"subject":"b773dd76-8494-419d-913e-b60fc830e8cb","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x1a19b0bda0875daa672a3c7bd58be64b6428ef034489f018133b21c5fd3227b1
2. 0x89234653448fbc9115f8a0e795cf83f6675ba81862d82d2519b6c95cd0bbfc40
3. 0x39ad6170b8e742bd5a12a879c52e0053c43f85a57c4b0e4ebb0e2c59a8eaba04
4. 0x1d21e966bff3356dc22842856d67f05a8b26ed70cc5ffb91f1ad38a4173c574b
5. 0xaa45fc44debdf97c902fd6ea77a7a15234d85b04de6e340498fb9573c6b0920b
6. 0xf59e9000227e540567d9eb2c278d5208b08b4bc998c037dc93247e2dbc2b28b1
7. 0x7b6cf67023d6ce4679a1d8ea15bf535407a95dcbc601267bdf87e49cf27fcbd0
8. 0xf4ad69c86d4332b5d347e8d6ffd1fb065f42a637e4db7b1334172726b47cf40f
9. 0xf1291425804580241d3686dedbf6f796eab319f43a3b184360a8a15d451ffa47
10. 0x6d27c5c63ea66456b677294ea72b347a864d782d8f8fd8c013fee5d576ad8725
11. 0x6a51e1d524ffd968d6f505e10f76aacd4ae61fc223a88a38ef8820592653c75a
12. 0x6a8a72430804a14ec575375f3d0ca4364f58310afb2c2e8c92b72f8b75809db9
13. 0xe00c7829e46541e49a308807d357db902e06eff941a833217a8f0dbccd3964f1
14. 0x770e4376196188c7fc9ec40f8e218dc0d1cb92bba5fe0425a0edce27ca9a997f
15. 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae