Evidence row 123529

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://underground.substratesymposium.com/buy/sparring"
    ]
  ],
  "name": "underground.substratesymposium.com/buy/sparring",
  "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": "Sparring — Competitive challenge for sharp thinking under adversarial conditions.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "content": "Competitive challenge for sharp thinking under adversarial conditions.",
              "delivered_at": "2026-04-24T10:00:00Z",
              "product": "sparring",
              "title": "Sparring"
            },
            "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": "2026-10-10T23:00:53.398Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-10T23:00:53.265Z"
    },
    "resource": "https://underground.substratesymposium.com/buy/sparring",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Sparring — Competitive challenge for sharp thinking under adversarial conditions."
}

What the leaf hashes

{"body":"58ff39d1fed7844b7d0c4ed9b9aac23f4319443bdaf7f906e97b10aafbf65cee","id":123529,"kind":"listing","method":"baseline/1","observed_us":1793025623287463,"prev":null,"subject":"x402_bazaar:https://underground.substratesymposium.com/buy/sparring","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. 0xc85e9b301e823759f125ea047f86d6b694e70576c1c16a7c47fc2e8cb7e31d67
2. 0x52d73e2f602eb8909ff8e350a7df000e642f3312b1facaa905cf29b69c3721d4
3. 0x2e00e42afd4d9232a0ecde81b53ca6e5eb9b0e8985f371126205763637aefd33
4. 0xeb1c760b79d10196187f6dba5744518f014f4240e240f93e4cb868011d8e95c4
5. 0x4aa4b02ed616f2cbffdb90dc95b4ce98e6386fbeff98840a652a2beedac78691
6. 0x9393eb9519c5a7514e832f744ff6c0529fea6566c4f3c10de3c2f806c38f9c18
7. 0x8a798ec5fb5d9b71938f4f22ce5867d6041701597015b1a34c1506299bd66314
8. 0xfd291ec79b01485993df7cfa5eb3a4e34a0e398421b8bf2d8c5c82b4826d6175
9. 0xcb860e4cc96a375ac0b376f085ee098285ada127d89a9e4e5e6e27bcbf151aa5
10. 0x675ae978905879f96dab2ece83376d01eb27968f2044719307dbc7f840ae0cec
11. 0xac575d7ca8c3c7e88957908dda0517fbb35f0894886bb91a97cff3aa71fa23e9
12. 0xde09984239f27618a13932caf48f5d39831fc5021500b0581dce0dabd570bd6e
13. 0x72e35aac89ebca631656c2b1aecbdc094807d9807f12c22a6ddf35cc1f5e21d6
14. 0x5b20d8aab05225a3497eadcce89d2e2a586a510fb31334793d3f46f88f0157c5
15. 0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae