Evidence row 558354

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://tabularium.matt-3e0.workers.dev/read"
    ]
  ],
  "name": "Tabularium",
  "owner_address": "0x951bd91ad61d2d867f21b54d2f717d8fff4ad28a",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:8453",
        "payTo": "0x951BD91AD61d2D867F21b54D2f717D8FFF4aD28a",
        "scheme": "exact"
      }
    ],
    "description": "Latest value for a key in the paying wallet's workspace, with its chain entry.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "key": "notes/today"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "entry": {
                "hash": "<sha256 hex of this entry>",
                "key": "notes/today",
                "op": "write",
                "prev": "<hash of entry 2>",
                "seq": 3,
                "ts": 1790000000000,
                "valueHash": "<sha256 hex of the value>"
              },
              "expiresAt": 1792592000000,
              "key": "notes/today",
              "ok": true,
              "state": "active",
              "value": "Met the supplier; follow up Friday.",
              "wallet": "0x..."
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "key": {
                      "pattern": "^[A-Za-z0-9._:/-]{1,128}$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "key"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T20:45:29.242Z",
    "quality": {
      "l30DaysTotalCalls": 50,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-27T05:02:00.814Z"
    },
    "resource": "https://tabularium.matt-3e0.workers.dev/read",
    "serviceName": "Tabularium",
    "tags": [
      "agent-memory",
      "storage",
      "verifiable",
      "hash-chain",
      "key-value"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Latest value for a key in the paying wallet's workspace, with its chain entry."
}

What the leaf hashes

{"body":"13b1a8057b3f4b061a8a0ebb4d9bb6c9c13871e7f2e393d1c7fd18120242d965","id":558354,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793134973793162,"prev":547665,"subject":"x402_bazaar:https://tabularium.matt-3e0.workers.dev/read","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xf7e4f15bf69263637d20112808a64d94c6faa83b64b4dc3f424424232be025ff
2. 0x43d8839534f5e7efb7f8f5b63cfb21a3398a32f3f4f787007e42727bb33b5788
3. 0x505fcfda9e091d2ed85431fe2e0114784a46d01475fea49815be9b096baf9c7e
4. 0xae3fbb1e9eb5552531745053ad9882ab7e5b9ebd41f5de4589b480f4f890ab5f
5. 0x6e14fab97b60e50f7b3209fc89125ce2653b6d19733ec69351bbb0eb1a381db9
6. 0x0edea330e50de6053d40b0bb930b6317a080c8d780819ff0e1a20dadcdfe8a82
7. 0xb3b3532c1bcca4f356cac9430c77ed4d6772f95f51e448908229c4c04ce6c155
8. 0xd91ec82a8f9cdd9d20dd8af420a325e3b2655d00d1109e91f31a4cc6758e0939
9. 0xd4c5083e57c8b1c226ca5cca356c40059b07ecc7322e73d192a2406d90a20ce4
10. 0x0fa167eb3be4aa29b7fd8dc74284b91fa45ab96e10ea6dff4ea5cba0573c64a0
11. 0x12408384d08af700ef3fb795be2a17733a31e199b760d2ea0302452891a37f3f
12. 0x3d6ce9e9447d644baa93c05c5ec0a44778000bfa82e0208f4a0086c782198964
13. 0x2cba9be288dab78cb9c5f54fa13242712b2493da9f833a7c3cdd92cde60662b0
14. 0x94d3785ce9330e4580bccada5459380aa2aac76a0bf11354d1353b375afc17d2
15. 0xb5b652bba4a5afca56c21031d89b1c06361563aaf54ccc8541c296ceeb2b66fa

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4