Does GLD / WETH match its issuer's published contract?

QED signs a canonical JSON payload. Fetch the public key from /.well-known/qed.json, then check the signature against this payload.

Canonical JSON

{"block":96923213,"chain":"robinhood","checked_at":"2026-10-24T17:06:13Z","dev":false,"expires_at":"2026-10-25T17:06:13Z","issuer":"Robinhood","pool":{"base":{"address":"0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73","balance":"20199578505071839455","decimals":18,"symbol":"WETH"},"chain":"robinhood","dex":"uniswap-v3","pool":"0x26250bA84465454bc731F710E46F1f32b167d66B","quote":{"address":"0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","balance":"75068462764271080930","decimals":18,"symbol":"GLD"}},"quote_share_of_supply":0.0033970304287872,"reads":[{"block":96923213,"method":"eth_blockNumber","params":[],"result_hash":"80621da4cb2bb75d1de87e7551e5fbbf4be32ff9897d3bc11a2d9b04d9903680","slot":null},{"block":null,"method":"eth_call","params":["0x26250bA84465454bc731F710E46F1f32b167d66B","token0()"],"raw_result":"0x0bd7d308f8e1639fab988df18a8011f41eacad73","result_hash":"de544c5c8fa36cc133d3195abda0458ac2fac1d8dc7a92dfa423a4c9aa1b415d","slot":null},{"block":null,"method":"eth_call","params":["0x26250bA84465454bc731F710E46F1f32b167d66B","token1()"],"raw_result":"0xc9a981fee1f9dec688bb123ccdecc63d0debfc4e","result_hash":"99aa527799a5c0da77c5cfd6d7c1de5bafb9738bcb6da370d88445bccfbf03c2","slot":null},{"block":null,"method":"eth_call","params":["0x26250bA84465454bc731F710E46F1f32b167d66B","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x26250bA84465454bc731F710E46F1f32b167d66B","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x26250bA84465454bc731F710E46F1f32b167d66B","factory()"],"raw_result":"0x1f7d7550b1b028f7571e69a784071f0205fd2efa","result_hash":"bf7614e6e838b22e4363dfcb3022451641875235ca13e64f8d2d8c3334ff85f3","slot":null},{"block":null,"method":"eth_call","params":["0x26250bA84465454bc731F710E46F1f32b167d66B","fee()"],"raw_result":"500","result_hash":"5ac95f46dcda9e6a85f4d281cd691aea7b00846d8f8612d198d396136e9c5140","slot":null},{"block":null,"method":"eth_call","params":["0x1f7d7550B1b028f7571E69A784071F0205FD2EfA","getPool","0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73","0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","0x1f4"],"raw_result":"0x26250ba84465454bc731f710e46f1f32b167d66b","result_hash":"fff5426d8133fed6369d14bfdb4e5bd86bffaf8c0880ce060fc0cace30a40ea5","slot":null},{"block":null,"method":"eth_call","params":["0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73","symbol()"],"raw_result":"Some(\"WETH\")","result_hash":"dc9a1e89eb43cbff5ed113508a53364a9573ef16fa5feb01fc948b3da8bfe14b","slot":null},{"block":null,"method":"eth_call","params":["0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73","balanceOf","0x26250bA84465454bc731F710E46F1f32b167d66B"],"raw_result":"Some(\"20199578505071839455\")","result_hash":"3ca6fb65e092c0524e3bca42d409a71317026c38eb8813ae412b087cad7f472f","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","symbol()"],"raw_result":"Some(\"GLD\")","result_hash":"b3bfe63bf387db068fb1b240a7b959fa983a7df54741c9264d1993cd7cc1fcc7","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","balanceOf","0x26250bA84465454bc731F710E46F1f32b167d66B"],"raw_result":"Some(\"75068462764271080930\")","result_hash":"6f5140cf989d0baca4e717e512a0a2369b7310a3b98852d5c02a98c28912d328","slot":null},{"block":null,"method":"eth_call","params":["0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73","symbol()"],"raw_result":"Some(\"WETH\")","result_hash":"dc9a1e89eb43cbff5ed113508a53364a9573ef16fa5feb01fc948b3da8bfe14b","slot":null},{"block":null,"method":"eth_call","params":["0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73","name()"],"raw_result":"Some(\"WETH\")","result_hash":"dc9a1e89eb43cbff5ed113508a53364a9573ef16fa5feb01fc948b3da8bfe14b","slot":null},{"block":null,"method":"eth_call","params":["0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73","totalSupply()"],"raw_result":"Some(\"41393734508832637064298\")","result_hash":"5ec4fcf93040243d4d6433d7eb1f2e2c58425483a31344248d076c9534e966ef","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","symbol()"],"raw_result":"Some(\"GLD\")","result_hash":"b3bfe63bf387db06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Gold Trust • Robinhood Token\")","result_hash":"f93e660f129f86e8187e4fb708f6fc96e69642a7305f8b2289053bf57013c23b","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","totalSupply()"],"raw_result":"Some(\"22098260330000000000000\")","result_hash":"8ce7a608aa1b3acf9772ce18daf349dfb25dd149c27378eed007ee73a5bad1ea","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"robinhood","contract":"0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-24T16:48:46Z","name":"SPDR Gold Trust","official_deployments":[{"address":"0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","network":"Robinhood Chain"}],"source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"GLD"},"registry_hash":"875caaae33462352de557e32fb0c2eaad153831bdcad79185f569e93183515eb","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x26250bA84465454bc731F710E46F1f32b167d66B","ticker":"GLD","verdict":{"Verified":{"issuer":"Robinhood","ticker":"GLD"}},"version":1}

Signature

EYp4naU/r9wyDBnv0FAWvFjeFcrQbX88QBnUxgvBY//+ITI6WsDMvURghytgfworefKL2fANQz00wsbaffj9DQ==

API call

GET /api/attest/9036f31e0d762b5452abbb9737b03a1e81ebedf36b62642e095803f5dc49ce22

1. Fetch the public key and attestation JSON, then verify the signature with the published key.
2. Canonicalize the payload with sorted object keys and no whitespace, then verify its SHA-256 attestation id.
3. Run the API call above and compare the returned payload, serial, signer, and signature with this certificate.