Evidence row 123439

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://underground.substratesymposium.com/buy/focus"
    ]
  ],
  "name": "underground.substratesymposium.com/buy/focus",
  "owner_address": "0xa3babb36564b0383a82c617050306ee30fd18e08",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xA3bAbB36564b0383a82c617050306EE30fd18E08",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "5HK2dGaaquDWFnYWaWhMzMYtbcDsqeq5biJ2PMtX1tkN",
        "scheme": "exact"
      }
    ],
    "description": "Focus Drills — Attention training for filtering distractions and maintaining concentration.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "content": "Attention training for filtering distractions and maintaining concentration.",
              "delivered_at": "2026-04-24T10:00:00Z",
              "product": "focus",
              "title": "Focus Drills"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {},
                  "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": "2026-10-10T23:05:19.687Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-10T23:05:19.551Z"
    },
    "resource": "https://underground.substratesymposium.com/buy/focus",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Focus Drills — Attention training for filtering distractions and maintaining concentration."
}

What the leaf hashes

{"body":"f2f46258f4a0097daff3e5e3ea710ef4fcb4661573872303d886fe8e8741cdd5","id":123439,"kind":"listing","method":"baseline/1","observed_us":1793025623175313,"prev":null,"subject":"x402_bazaar:https://underground.substratesymposium.com/buy/focus","subject_kind":"source_record"}

Proof

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

1. 0x03e2832266715cf1c1e3056de98d1d4e0eabd70fc33fbf98be1fb70403ab99f1
2. 0x999e31c3c1e483d787759770dee09bcb882d06412603ba09af468d028918fc9f
3. 0x827a1912436391ddfba7b321cc883e27e8480e66dda11464cf135982224b88a8
4. 0xe37826899a1b9d1b440e80ee153bf0fa20d170eba1f68f0da8e40a0163c4b067
5. 0xc3c092c2a74df435570da6d46a929b4c3be632ea9376bceeef6fed24f6091b88
6. 0x32b1f1d646193d4a67962436ef08b7182d2bd3609e6f0b502d619a8527be9189
7. 0x6c5f26ad055e2a03e66dbd01e45a0aa18712c7b59bb250e05fb649b3fb6f095a
8. 0x2ac9b39dfcdac5f6befd9e42d8f703b710bc2856970005280def699dbc9acba8
9. 0xe95980e57b9f67f38d56253d1f45962fd4fc8579bcf5c1a812e4e879917c203a
10. 0x1f18e0b2e922935cd8cf72485fb2b121046aa17f2946bfa3d06b3e3837120a98
11. 0x0dadbaadc61f6ee6be4586a11afb533e54da3f5fef5c8ec2ecba1bfa573ce6d3
12. 0x23033d81d9f4be06225e4276d276e0e8e02abc173d156a1b9a8fd5e4803ad199
13. 0x610fdf3e989af0a6b4a400a3a8aab9156d757f8c96efe4e9d0594dfd04de1cc0
14. 0xd1d3499072edb10edc68f84bcae2365d2ab534df689250cab18c751b6f13b6ff
15. 0x7ddc2fead128357f881b63e6c7c26d7fbbb84fca6c7c8e0bbfe386de86ca8d39
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae