MXL/USDG

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":76131637,"chain":"RobinhoodChain","checked_at":"2026-09-30T01:43:36Z","dev":false,"expires_at":"2026-10-01T01:43:36Z","issuer":"Robinhood","pool":{"base":{"address":"0x48961813349333209994750ffA89b3c5C22eC969","balance":"17199692685686178557","decimals":18,"symbol":"MXL"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0x6d967ECA453181e410be4b8F8a83A3523618696E","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"2682186972","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.1562912219619095,"reads":[{"block":null,"method":"eth_getCode","params":["0x6d967ECA453181e410be4b8F8a83A3523618696E","latest"],"result_hash":"bd8ebc145dd3e6017c79d25b7030e33596e5430c33f2d56db80dabaa339e670f","slot":null},{"block":76131637,"method":"eth_blockNumber","params":[],"result_hash":"7dd6c264179cb51f6b2107e6965cd66e6744a8540612a0d98eec2ce3d1fed7cc","slot":null},{"block":null,"method":"eth_call","params":["0x6d967ECA453181e410be4b8F8a83A3523618696E","token0()"],"raw_result":"0x48961813349333209994750ffa89b3c5c22ec969","result_hash":"38ee8e815720457c30fdd5a0b0d5edc4d11184ef5738455059a20c6790879516","slot":null},{"block":null,"method":"eth_call","params":["0x6d967ECA453181e410be4b8F8a83A3523618696E","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x6d967ECA453181e410be4b8F8a83A3523618696E","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x6d967ECA453181e410be4b8F8a83A3523618696E","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x6d967ECA453181e410be4b8F8a83A3523618696E","factory()"],"raw_result":"Some(0xe0c4ceb92d08ca985bb70fe0a22feb121a9854a8)","result_hash":"317250863b6884b96004007b3587ad2dfee13451d926500b1fc9bac72405dd84","slot":null},{"block":null,"method":"eth_call","params":["0x48961813349333209994750ffA89b3c5C22eC969","symbol()"],"raw_result":"Some(\"MXL\")","result_hash":"1663552ddced41860c6758f26a5094ad92329799a172cf8e55c45d54c7dead3d","slot":null},{"block":null,"method":"eth_call","params":["0x48961813349333209994750ffA89b3c5C22eC969","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x48961813349333209994750ffA89b3c5C22eC969","balanceOf","0x6d967ECA453181e410be4b8F8a83A3523618696E"],"raw_result":"Some(\"17199692685686178557\")","result_hash":"4ddd376a62f0217d202e333328e7154fee71725e098df20774b0133baf7c0cb9","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","0x6d967ECA453181e410be4b8F8a83A3523618696E"],"raw_result":"Some(\"2682186972\")","result_hash":"d92e00d14a8aa687548a07752becdbccfc624863aaf76acbd74b26d0f0d29ff1","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(\"684206116727748\")","result_hash":"c28c2840d974e7edbc2a78b90480774f945654809c745dedb1dcb4e21aaea62f","slot":null},{"block":null,"method":"eth_call","params":["0x48961813349333209994750ffA89b3c5C22eC969","symbol()"],"raw_result":"Some(\"MXL\")","result_hash":"1663552ddced41860c6758f26a5094ad92329799a172cf8e55c45d54c7dead3d","slot":null},{"block":null,"method":"eth_call","params":["0x48961813349333209994750ffA89b3c5C22eC969","name()"],"raw_result":"Some(\"MaxLinear • Robinhood Token\")","result_hash":"3f069b7c3bdee183f0d5ced9066d8108100cbcafed520f8f487ea1a7cbf4d620","slot":null},{"block":null,"method":"eth_call","params":["0x48961813349333209994750ffA89b3c5C22eC969","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x48961813349333209994750ffA89b3c5C22eC969","totalSupply()"],"raw_result":"Some(\"110049000000000000000\")","result_hash":"fd0f8ddc5e7120e9884e20602b15fd3394463ed5ec75d458056c2e5a20b68644","slot":null},{"block":null,"method":"eth_call","params":["0x48961813349333209994750ffA89b3c5C22eC969","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0x48961813349333209994750ffA89b3c5C22eC969","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x48961813349333209994750ffA89b3c5C22eC969","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x48961813349333209994750ffA89b3c5C22eC969","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-30T01:37:24Z","name":"MaxLinear","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"MXL"},"registry_hash":"abef97b3ad2938b7051778363de6a051cdf8518e229b4f37504bec93f04b4868","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x6d967ECA453181e410be4b8F8a83A3523618696E","ticker":"MXL","verdict":{"Verified":{"issuer":"Robinhood","ticker":"MXL"}},"version":1}

Signature

YUfxxBKYzLfj6VpkuLJj3pSWjxWMEhpWrNRbLu/BJ3pPamSi3FsogOM8pMbIfktIGXlUzkmcrvDG+znveH+9BQ==

API call

GET /api/attest/d8122b043c024fe8c34f8f3cd0f2465555bed3fcef3fecc8df07981ab5048c4a

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.