Does SGOV / USDG 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":98544558,"chain":"robinhood","checked_at":"2026-10-26T16:14:05Z","dev":false,"expires_at":"2026-10-27T16:14:05Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"851483903293","decimals":6,"symbol":"USDG"},"chain":"robinhood","dex":"uniswap-v3","pool":"0xfAb520051f96F4D2a32c22B6a3dD7fFfdf231bFe","quote":{"address":"0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","balance":"1200736483505837084036","decimals":18,"symbol":"SGOV"}},"quote_share_of_supply":0.07067140441657863,"reads":[{"block":98544558,"method":"eth_blockNumber","params":[],"result_hash":"80a637f8a6832589ae0a62777e6cb982fa1a56d1383a43ef45e4f6f75cfac1b7","slot":null},{"block":null,"method":"eth_call","params":["0xfAb520051f96F4D2a32c22B6a3dD7fFfdf231bFe","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xfAb520051f96F4D2a32c22B6a3dD7fFfdf231bFe","token1()"],"raw_result":"0x92fd66527192e3e61d4ddd13322aa222de86f9b5","result_hash":"efac6fbf506762bad9cf0d0a8eabdc9bd856304bf6af4af48d244112497a5cee","slot":null},{"block":null,"method":"eth_call","params":["0xfAb520051f96F4D2a32c22B6a3dD7fFfdf231bFe","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xfAb520051f96F4D2a32c22B6a3dD7fFfdf231bFe","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xfAb520051f96F4D2a32c22B6a3dD7fFfdf231bFe","factory()"],"raw_result":"0x1f7d7550b1b028f7571e69a784071f0205fd2efa","result_hash":"bf7614e6e838b22e4363dfcb3022451641875235ca13e64f8d2d8c3334ff85f3","slot":null},{"block":null,"method":"eth_call","params":["0xfAb520051f96F4D2a32c22B6a3dD7fFfdf231bFe","fee()"],"raw_result":"3000","result_hash":"53232d7da9fd2a1931dcd44af08ec415dd52ab8ecc4037ef5e68eb3753978a2e","slot":null},{"block":null,"method":"eth_call","params":["0x1f7d7550B1b028f7571E69A784071F0205FD2EfA","getPool","0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","0xbb8"],"raw_result":"0xfab520051f96f4d2a32c22b6a3dd7fffdf231bfe","result_hash":"9bd6aa7e8fd4faf5f18b9df6977982ca62619f785976b60ef901e8036cfcc99b","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","symbol()"],"raw_result":"Some(\"USDG\")","result_hash":"5cbfd9547b12ffd28d96e5f55c97290c4f230a8d7ad7bbe91dc15f2e61c1a3c5","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balanceOf","0xfAb520051f96F4D2a32c22B6a3dD7fFfdf231bFe"],"raw_result":"Some(\"851483903293\")","result_hash":"c410ae0dd0d3c0aad19bd9462c738ee37d956b28429576c518a0585725fc7db8","slot":null},{"block":null,"method":"eth_call","params":["0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","symbol()"],"raw_result":"Some(\"SGOV\")","result_hash":"f3673135cf2fb7b6e02e87e5d9870c488e13d35aa478ceba27735fcb2eba1e36","slot":null},{"block":null,"method":"eth_call","params":["0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","balanceOf","0xfAb520051f96F4D2a32c22B6a3dD7fFfdf231bFe"],"raw_result":"Some(\"1200736483505837084036\")","result_hash":"4d7118a44d5ccdc56ce35efbb44339209cf841f226cd610e69dd0e369bab2ebc","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","symbol()"],"raw_result":"Some(\"USDG\")","result_hash":"5cbfd9547b12ffd28d96e5f55c97290c4f230a8d7ad7bbe91dc15f2e61c1a3c5","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","name()"],"raw_result":"Some(\"Global Dollar\")","result_hash":"e34c795a5a7df6a2269bde7247321204357731d7742ef5974b04eb6899db8b11","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","totalSupply()"],"raw_result":"Some(\"673290333355447\")","result_hash":"91442fcedca9f8bd6450addac50959f23aa5b42896e98eb88edd29493601c344","slot":null},{"block":null,"method":"eth_call","params":["0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","symbol()"],"raw_result":"Some(\"SGOV\")","result_hash":"f3673135cf2fb7b6e02e87e5d9870c488e13d35aa478ceba27735fcb2eba1e36","slot":null},{"block":null,"method":"eth_call","params":["0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","name()"],"raw_result":"Some(\"iShares 0-3 Month Treasury Bond • Robinhood Token\")","result_hash":"c74558947338d144bffc729b4dc6335459832aa9938ad34fc461815f90f08ea1","slot":null},{"block":null,"method":"eth_call","params":["0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","totalSupply()"],"raw_result":"Some(\"16990414912770000000000\")","result_hash":"f69b09c07df347c9cd01c98cd64a23909b7b84e11741184db80f41fec07ffbdb","slot":null},{"block":null,"method":"eth_call","params":["0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","uiMultiplier()"],"raw_result":"1007186931447954063","result_hash":"b57394a993733f8c332a65ab395d1c324ac85edcd12539704d7a48fe81d248e3","slot":null},{"block":null,"method":"eth_getCode","params":["0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"robinhood","contract":"0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-26T16:07:31Z","name":"iShares 0-3 Month Treasury Bond","official_deployments":[{"address":"0x92FD66527192E3e61d4DDd13322Aa222DE86F9B5","network":"Robinhood Chain"}],"source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"SGOV"},"registry_hash":"e8119cb0317ea07d1e35c7a817d5c01a1368b0c8c286ac3f2d769866d59ffe70","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xfAb520051f96F4D2a32c22B6a3dD7fFfdf231bFe","ticker":"SGOV","verdict":{"Verified":{"issuer":"Robinhood","ticker":"SGOV"}},"version":1}

Signature

9ZQTypnnhU86m/jN0SLTj/g5RTBJ4DAyDJWPqrU5kAakBBcglqu4TpUH1/c5gW6MsCHJZjgXHtqaQoKg+wd8BQ==

API call

GET /api/attest/e1997d5e6d1b86ac26fa976ace92830c7e657ef128a1fd4ce7d273f8f54f09e5

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.