USDG/NVDA

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":79451795,"chain":"RobinhoodChain","checked_at":"2026-10-03T22:49:09Z","dev":false,"expires_at":"2026-10-04T22:49:09Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"124062291313","decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xdac1904D823F7d6bcAaF431ceEe40c934fEd321b","quote":{"address":"0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","balance":"106615214563189422303","decimals":18,"symbol":"NVDA"}},"quote_share_of_supply":0.0014181427851706967,"reads":[{"block":null,"method":"eth_getCode","params":["0xdac1904D823F7d6bcAaF431ceEe40c934fEd321b","latest"],"result_hash":"71262f4d09df2b7d73823c3df523384b1195899471c7f4e66a45db9dd2755dc8","slot":null},{"block":79451795,"method":"eth_blockNumber","params":[],"result_hash":"102d3625f0bb92d90ce9387f266f7fe5420c70bc461e097e08e1bc172676fb68","slot":null},{"block":null,"method":"eth_call","params":["0xdac1904D823F7d6bcAaF431ceEe40c934fEd321b","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xdac1904D823F7d6bcAaF431ceEe40c934fEd321b","token1()"],"raw_result":"0xd0601ce157db5bdc3162bbac2a2c8af5320d9eec","result_hash":"837593898070a9209e25b8e838227fd9a1d34f048e67360db2591dc0ee9b7688","slot":null},{"block":null,"method":"eth_call","params":["0xdac1904D823F7d6bcAaF431ceEe40c934fEd321b","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xdac1904D823F7d6bcAaF431ceEe40c934fEd321b","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xdac1904D823F7d6bcAaF431ceEe40c934fEd321b","factory()"],"raw_result":"Some(0xe0c4ceb92d08ca985bb70fe0a22feb121a9854a8)","result_hash":"317250863b6884b96004007b3587ad2dfee13451d926500b1fc9bac72405dd84","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","0xdac1904D823F7d6bcAaF431ceEe40c934fEd321b"],"raw_result":"Some(\"124062291313\")","result_hash":"09ed57e5d9a51a6238b697462ad27f10cb66db5da0524eaf36adc72aef7c05e4","slot":null},{"block":null,"method":"eth_call","params":["0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","symbol()"],"raw_result":"Some(\"NVDA\")","result_hash":"021d1642ab9caf5c93ff501b70a3d5285343a63f3b632bcbe7daed2fdac7ebfb","slot":null},{"block":null,"method":"eth_call","params":["0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","balanceOf","0xdac1904D823F7d6bcAaF431ceEe40c934fEd321b"],"raw_result":"Some(\"106615214563189422303\")","result_hash":"c43363c5b8afc909044f60aa5895c0313c8b8050c6147d62138d335605214fea","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(\"699819670332139\")","result_hash":"81336642bacc16f41b48135f82e17aec30caad4843886abb7ffbed9682b61502","slot":null},{"block":null,"method":"eth_call","params":["0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","symbol()"],"raw_result":"Some(\"NVDA\")","result_hash":"021d1642ab9caf5c93ff501b70a3d5285343a63f3b632bcbe7daed2fdac7ebfb","slot":null},{"block":null,"method":"eth_call","params":["0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","name()"],"raw_result":"Some(\"NVIDIA • Robinhood Token\")","result_hash":"164300b6b2737c6d4c2f7641a7df85a5a7adae8429019a4b66cdf2e8e5fe57c6","slot":null},{"block":null,"method":"eth_call","params":["0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","totalSupply()"],"raw_result":"Some(\"75179464069520000000000\")","result_hash":"904234df7cdc560c9f7809d993a35e8362275c9af2013c1a0c420466b9323134","slot":null},{"block":null,"method":"eth_call","params":["0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","uiMultiplier()"],"raw_result":"1000775159164630595","result_hash":"52e5ec7fbc2c3245d93278c80d04f4f9d203a2a2284a006b4b2e708b84182d87","slot":null},{"block":null,"method":"eth_getCode","params":["0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0xd0601CE157Db5bdC3162BbaC2a2C8aF5320D9EEC","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-03T22:14:21Z","name":"NVIDIA","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"NVDA"},"registry_hash":"006986c2cdeb6f5281a7abf7a127ac65f5337499c7a4f8290df6f511d987f46e","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xdac1904D823F7d6bcAaF431ceEe40c934fEd321b","ticker":"NVDA","verdict":{"Verified":{"issuer":"Robinhood","ticker":"NVDA"}},"version":1}

Signature

qJL0g2eoFboULYntFuA1ZttKrHIDl3tkriOUOlEB8Ma4VoHN06qZZzDq8vIAbBs82dEpoQ2X0PWhT/sG9noOBg==

API call

GET /api/attest/917967988e744acbc6f3e2989bb32e47c4346d6f6d1b0ea55e3576216fa8ed4c

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.