Evidence row 117303

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://music.openverbs.com/v1/chord"
    ]
  ],
  "name": "Build a chord",
  "owner_address": "0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
        "scheme": "exact"
      }
    ],
    "description": "Build a chord from a root note and quality (major, minor, dim, aug, maj7, min7, dom7, dim7, half-dim7, sus2, sus4, maj6, min6). Notes are spelled by stacked thirds (C dom7 → C E G Bb). Returns the note names, MIDI numbers and semitone intervals.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "quality": "major",
              "root": "C4"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "quality": {
                      "description": "Chord quality.",
                      "enum": [
                        "major",
                        "minor",
                        "dim",
                        "aug",
                        "maj7",
                        "min7",
                        "dom7",
                        "dim7",
                        "half-dim7",
                        "sus2",
                        "sus4",
                        "maj6",
                        "min6"
                      ],
                      "type": "string"
                    },
                    "root": {
                      "description": "Root note, e.g. \"C4\".",
                      "maxLength": 8,
                      "minLength": 1,
                      "type": "string"
                    }
                  },
                  "required": [
                    "root",
                    "quality"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-08T05:39:53.508Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-08T05:39:53.245Z"
    },
    "resource": "https://music.openverbs.com/v1/chord",
    "serviceName": "Build a chord",
    "tags": [
      "build music chord",
      "chord notes generator",
      "chord quality lookup",
      "triad seventh chord api",
      "generate chord tones"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Build a chord from a root note and quality (major, minor, dim, aug, maj7, min7, dom7, dim7, half-dim7, sus2, sus4, maj6, min6). Notes are spelled by stacked thirds (C dom7 → C E G Bb). Returns the note names, MIDI numbers and semitone intervals."
}

What the leaf hashes

{"body":"c4e56954a79ee1f30dd4254fd11db15ee00048f082a97083252e4286ca8cd274","id":117303,"kind":"listing","method":"baseline/1","observed_us":1793025610979883,"prev":null,"subject":"x402_bazaar:https://music.openverbs.com/v1/chord","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. 0x3e890e86a7696382d9c09b16c8bbea6a0beb97e49e0d21ef69e4ff40c598042c
2. 0x0578a17a0f72a541b8d0a8efb23dd6fd283d79c86bf3ee7472929a6062855c97
3. 0xd0f1ec763753e8e4c1b22afe410d9147b64fef6a0db522d164666ee3b585964a
4. 0xb283dbe9d4d846aaf5faa204101fef2d344931fed6ce58934ac6910db9575a6e
5. 0xc0384dc71c221fbeff040b6a3c85756f237a3b6510fdf52759f96fffbea21a9b
6. 0x6ad77d98865eb857c386b79e27e8aedbee6a687a9c5d6fa3d5c965969b97331a
7. 0x995b8534d26f782b95e501f1ab5f219c8e8128ebc4048fb943785f5b995b8951
8. 0x266023a7ca2e27ad2f8159a7a5f583b840e84538d5e24c91772258c7db63cb67
9. 0x278b57004432e1248c5169a8df1b1834df696ee7256b842515a2b0c2f6f3ecad
10. 0x870d07b9eca299ca4a4138d50bec59a15e7e0971fcb5751398118bfa5b9f74e6
11. 0xeff3ae4ccee9e9ab663bed39de24a2076950808876228a89701d6ab7f016bd7e
12. 0x1afc0318a98c6dbb5a80e5cb86eba22b844e3f3b185a16f17290e29ab7410f55
13. 0x215f432600b78f2e7c9629cd10ce6ce4b7f3351b0b71f3f2c7dcb8e650f6cd63
14. 0x7f594f5609f388d64d3cda87b5631d393ee8300bb09bad71f150113a5886ee33
15. 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae