Evidence row 121545

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://sovereign-x402-zeta.vercel.app/api/v1/sequence/catalan"
    ]
  ],
  "name": "sovereign-x402-zeta.vercel.app/api/v1/sequence/catalan",
  "owner_address": "0x41595e02275629126ad11551e39ee9ac8531ad3c",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x41595e02275629126aD11551E39ee9Ac8531Ad3C",
        "scheme": "exact"
      }
    ],
    "description": "Calculate the nth Catalan number.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "n": 10
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {},
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": true,
                  "properties": {},
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-08T21:16:50.707Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-08T21:16:50.538Z"
    },
    "resource": "https://sovereign-x402-zeta.vercel.app/api/v1/sequence/catalan",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Calculate the nth Catalan number."
}

What the leaf hashes

{"body":"37ec96affb0c29e6befc2cd3d93ba2665a3f08dc9a269a1fd6958c7d30444126","id":121545,"kind":"listing","method":"baseline/1","observed_us":1793025620049979,"prev":null,"subject":"x402_bazaar:https://sovereign-x402-zeta.vercel.app/api/v1/sequence/catalan","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. 0x7aa45d809fc2b6b9b54a00f065bb44789441f1d20bfd45d6b757188352866c92
2. 0x294c29ddc343cfdcd50fd0eb11a0b63bd8561970c41d13f0f38bd1285db88b95
3. 0xd6f2d4b059037bdc6baf5f87bee2c9d84388e1fc6d7accfb9b3c339162381de1
4. 0xae4254198d25c61fdb5e3435663b36fb6417b82ec7f7fb621f8a2c5128afbfcd
5. 0x2a56a649add5b3a5a2a3d3993068b8f7eedc148eaa1adb91e6ea84c5deaf44dd
6. 0x13ed397ad9761e81d4d22547dafd79cddffda3cc0f95a906b05fcf124834cc3b
7. 0xe9fddf4753de9c85c7a852bead99e4862be1fedc89fde12c531720f1caaed430
8. 0xda5dbea28c9d4fca8e466b041ea2667b84525618b6b004f830505d2fd0758b8e
9. 0x34ef0eafe8a19be079847713fba11d65e6ba0dd49a522368ade2cd52bd35f7bc
10. 0x72004cfd0b5574eac5ee651ce41187d0c3a331b4bdf0bdb385f7d93decec1860
11. 0x1474b20023ac420a3be8200f14f9ac14f1ee93ff05411fa3760c28b2e50fb3dd
12. 0xa6406b1a5540d26e0cbd03bb274a01c10968fadb17913a6043bb9427ddfb71ba
13. 0x01c95624b1f2385ef774ee258a9ae58a4df07a1bdaa829de84e1d5201f3f39c2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae