Evidence row 2201546

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://music-theory.x402tookit.com/interval"
    ]
  ],
  "name": "Music Theory",
  "owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "transactionVersions": [
            0
          ]
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      }
    ],
    "description": "Interval between two notes (quality, number, semitones) or the note a given interval above or below a note.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "from": "C4",
              "to": "E4"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T14:26:13.737Z",
              "compound": false,
              "degraded": false,
              "descending": false,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "from": "C4",
              "fullName": "major third",
              "interval": "M3",
              "inversion": "m6",
              "notChecked": [
                "tuning (an interval name says nothing about just or equal-tempered frequency ratios)",
                "intervals beyond triple augmented or diminished",
                "…1 more"
              ],
              "number": 3,
              "quality": "M",
              "reasons": [
                "Octaves given: compound intervals keep their full number.",
                "Quality comes from the letter names, so C to E is a major third but C to Fb is a diminished fourth."
              ],
              "semitones": 4,
              "simpleNumber": 3,
              "source": "computed locally",
              "summary": "C4 to E4: M3 (major third), 4 semitones.",
              "to": "E4",
              "verdict": "NAMED"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "direction": {
                      "description": "up (default) or down, used with interval",
                      "type": "string"
                    },
                    "from": {
                      "description": "Start note, optionally with octave: C, F#4, Bb3",
                      "type": "string"
                    },
                    "interval": {
                      "description": "Interval to apply instead of 'to': P1 m2 M2 m3 M3 P4 A4 d5 P5 m6 M6 m7 M7 P8 M9 ...",
                      "type": "string"
                    },
                    "to": {
                      "description": "End note: names the interval from start to end",
                      "type": "string"
                    }
                  },
                  "required": [
                    "from"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "compound": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "descending": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "from": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "fullName": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "interval": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "inversion": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "number": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "quality": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "semitones": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "simpleNumber": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "to": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T23:39:39.132Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T23:39:38.951Z"
    },
    "resource": "https://music-theory.x402tookit.com/interval",
    "serviceName": "Music Theory",
    "tags": [
      "music",
      "intervals",
      "semitones",
      "theory"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Interval between two notes (quality, number, semitones) or the note a given interval above or below a note."
}

What the leaf hashes

{"body":"f202988a703c412b3628e05fc54849c4d0c62ae50dec332fb6aa1748f85c68b2","id":2201546,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646806609771,"prev":null,"subject":"x402_bazaar:https://music-theory.x402tookit.com/interval","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0x346427e176b7a5f8fcfac3cb43c36c6f948436617e5032bd530587a53ed3bd02
2. 0xd0bd9d75ce161e6f75246c06a03401fb297bc31ed74da707289b2bc378c4d6fd
3. 0xff81c376035f8a8cbc134c62f1d494010b7835b48e2d4918ec41df548c18a59e
4. 0xd7ad9b3855fa61bfed3ac7a4b66b7bdbd2ea3b88d0f775fff3656bf0f183d8c1
5. 0x331f7a2fa5cfc33c110170f6c64a169339cbec9ac7a8aa142036dc11f34b1725
6. 0x2d959aa16eb47ede4f7103c4f15d2b5451448589605004d120e7741efb57dbad
7. 0xc08faa20346f14114eed10dec76966e88fe52d347a0d105e579dfbd4faebffd6
8. 0x8c90436c2ee7c8e2b6a56522abd7fc261fdb414806cfb295c1c5025963a6c57a
9. 0x18c3547e853ee2a7f1e85f67ccc7341599fdb806b8d0e61c83410ce1895efbb1
10. 0x069c6d7fc42076a92391904160aba6eec11ba3ac19dd648e41f6cb9191f4bedb
11. 0xb1f15ba35519c95a42e2b04a21e2a6b61c594766cbbb57a8dc40957b0e902f91
12. 0x1efab46c4a17e96ac7dd3a47036e0659527f621610fdcd6367cce8896f344474
13. 0xaabc34550f079fe0032f13b18945f4683cbb63c607e45516706e1dd02ac20d7f
14. 0xeda95b8bf6c7d0b27dc5b32d6a6006255f41e0f6bbe80842a49daa792f4de811
15. 0x464ce6fe060d0a6c4e810b71501e55084086148f7daf393caa14462b1a777022
16. 0xd42916b5c6441e9c8d91ff91715af1489cb83dee26d47e7da107caa4d2a68b65
17. 0xa20b9be86af7d690e040c9060a373b2fc5498edf3432f43c26f74fa2febc1e9a
18. 0x050f2978b537f7afb21ee1551577cdf146d1c56f4df12d24315ae5e69366b0a4
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af