USDG/PFE

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":76102179,"chain":"RobinhoodChain","checked_at":"2026-09-30T00:54:10Z","dev":false,"expires_at":"2026-10-01T00:54:10Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"47851376278","decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xC7d573Fcda6D2107C97fb582ae18411F9Db32E7f","quote":{"address":"0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","balance":"1063488262419043081160","decimals":18,"symbol":"PFE"}},"quote_share_of_supply":0.10989627628194507,"reads":[{"block":null,"method":"eth_getCode","params":["0xC7d573Fcda6D2107C97fb582ae18411F9Db32E7f","latest"],"result_hash":"4c248644a26cad7120cbf004d55d5cb3992d0c858d9828d01f2fbb926775cef5","slot":null},{"block":76102179,"method":"eth_blockNumber","params":[],"result_hash":"148e0d0754a8e0377762b204ef3f3376bde9eca7f5a5f816825e6526dcc5a16d","slot":null},{"block":null,"method":"eth_call","params":["0xC7d573Fcda6D2107C97fb582ae18411F9Db32E7f","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xC7d573Fcda6D2107C97fb582ae18411F9Db32E7f","token1()"],"raw_result":"0x7066a64c24e4206cd62e83bf198c1e7eb361f51e","result_hash":"d2a85fc2dfb11d84c03293d3f25780374e0b7faaca9a7908ecec4eca02af9b40","slot":null},{"block":null,"method":"eth_call","params":["0xC7d573Fcda6D2107C97fb582ae18411F9Db32E7f","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xC7d573Fcda6D2107C97fb582ae18411F9Db32E7f","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xC7d573Fcda6D2107C97fb582ae18411F9Db32E7f","factory()"],"raw_result":"Some(0x1f7d7550b1b028f7571e69a784071f0205fd2efa)","result_hash":"3a5325de1b5dc50662a9e2ec44d8428ded4306d2bd46195f62299474690e30aa","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","0xC7d573Fcda6D2107C97fb582ae18411F9Db32E7f"],"raw_result":"Some(\"47851376278\")","result_hash":"2ecf82bcd5fa58936ea06ffe1eb18eb39cdf3f51ba410873f8d5fcdeea4a6571","slot":null},{"block":null,"method":"eth_call","params":["0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","symbol()"],"raw_result":"Some(\"PFE\")","result_hash":"693d364f57f51ea431da024e95e0b6d3679c591ed747a286c1a491371961ac54","slot":null},{"block":null,"method":"eth_call","params":["0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","balanceOf","0xC7d573Fcda6D2107C97fb582ae18411F9Db32E7f"],"raw_result":"Some(\"1063488262419043081160\")","result_hash":"695b304b1fb573b25f7e8577daa1eac709dec4d10a0c6df598a0e958dba86bfb","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(\"683139360838188\")","result_hash":"84e8d8071640c7f005638499518532bbe91d428ba1a17c662bc3565abda9f6a9","slot":null},{"block":null,"method":"eth_call","params":["0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","symbol()"],"raw_result":"Some(\"PFE\")","result_hash":"693d364f57f51ea431da024e95e0b6d3679c591ed747a286c1a491371961ac54","slot":null},{"block":null,"method":"eth_call","params":["0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","name()"],"raw_result":"Some(\"Pfizer • Robinhood Token\")","result_hash":"b112992617583124b4fea70a6deae908f5bb4f4be95695eafb22fbe462d389d5","slot":null},{"block":null,"method":"eth_call","params":["0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","totalSupply()"],"raw_result":"Some(\"9677200160000000000000\")","result_hash":"84c41552101fab4e948e135780f17948c237a7ba39aeada5ba641bd2ff1eb958","slot":null},{"block":null,"method":"eth_call","params":["0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x7066A64c24e4206CD62E83bf198c1E7EB361F51e","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-30T00:37:24Z","name":"Pfizer","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"PFE"},"registry_hash":"5524ad353114ce82e4459bdb0533016e63f15d54f628b91498b20cf2b964d0de","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xC7d573Fcda6D2107C97fb582ae18411F9Db32E7f","ticker":"PFE","verdict":{"Verified":{"issuer":"Robinhood","ticker":"PFE"}},"version":1}

Signature

BUGbe2lSimM0pi+QxstLOdCyKOTwB2DCgutzx2j54VxRgHKkuvSgvIEmlBwHpvrDrR6ZNgvybvv4nvpdNxDECA==

API call

GET /api/attest/8fd613079d01339dad9061a62d24b2c5de54d728f982e29cfac799820d066525

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.