USDG/SMCI

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":76086900,"chain":"RobinhoodChain","checked_at":"2026-09-30T00:28:43Z","dev":false,"expires_at":"2026-10-01T00:28:43Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":null,"decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0x85664e8E308f6a936494768C9F4dbaA7b6D299A8","quote":{"address":"0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","balance":"106738477738849893274","decimals":18,"symbol":"SMCI"}},"quote_share_of_supply":0.25288264080633494,"reads":[{"block":null,"method":"eth_getCode","params":["0x85664e8E308f6a936494768C9F4dbaA7b6D299A8","latest"],"result_hash":"00b76f193108bd691dec2b4a5ef0b306066e0224adec0a37d54f8c51b0a17e69","slot":null},{"block":76086900,"method":"eth_blockNumber","params":[],"result_hash":"586b113a93b6948a81ec0e9bd2fc0af40369efa030bcfe2dcba23854aeceff63","slot":null},{"block":null,"method":"eth_call","params":["0x85664e8E308f6a936494768C9F4dbaA7b6D299A8","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x85664e8E308f6a936494768C9F4dbaA7b6D299A8","token1()"],"raw_result":"0xc01aa1fecec0605b13bc84874ff7256c0f5f562a","result_hash":"ccd792daa6d056c50a24382cc03c9a878745370223b235e67606446f2ebd2a5b","slot":null},{"block":null,"method":"eth_call","params":["0x85664e8E308f6a936494768C9F4dbaA7b6D299A8","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x85664e8E308f6a936494768C9F4dbaA7b6D299A8","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x85664e8E308f6a936494768C9F4dbaA7b6D299A8","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","0x85664e8E308f6a936494768C9F4dbaA7b6D299A8"],"raw_result":"None","result_hash":"f2953d2931e36d0c55640f51865f8394ebe52194765d04e521017232558f871c","slot":null},{"block":null,"method":"eth_call","params":["0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","symbol()"],"raw_result":"Some(\"SMCI\")","result_hash":"650708a4b6ac6ed1900120388a4ad61f051b0d29e163daea7a477b80a6735142","slot":null},{"block":null,"method":"eth_call","params":["0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","balanceOf","0x85664e8E308f6a936494768C9F4dbaA7b6D299A8"],"raw_result":"Some(\"106738477738849893274\")","result_hash":"6b02d08cb226a1b809a03e2060d3cb96998d34f2790c39ec551b8e6acdedd66d","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(\"683063373838188\")","result_hash":"f355ca7871776babd47deac76a9344dbb19466942678fa7974aa77db6582652a","slot":null},{"block":null,"method":"eth_call","params":["0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","symbol()"],"raw_result":"Some(\"SMCI\")","result_hash":"650708a4b6ac6ed1900120388a4ad61f051b0d29e163daea7a477b80a6735142","slot":null},{"block":null,"method":"eth_call","params":["0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","name()"],"raw_result":"Some(\"Super Micro Computer • Robinhood Token\")","result_hash":"edd55e4b529d043ab757e98c5f2c148e19a6d2b93fad83021ae987bb6fbc834c","slot":null},{"block":null,"method":"eth_call","params":["0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","totalSupply()"],"raw_result":"Some(\"422087010000000000000\")","result_hash":"07a4917ce2120cbb7a15255df2512443f4273988817ffb8ecf90fef1aa2cdfcd","slot":null},{"block":null,"method":"eth_call","params":["0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0xc01aA1fECeC0605b13bc84874ff7256C0f5F562a","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-29T23:37:24Z","name":"Super Micro Computer","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"SMCI"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x85664e8E308f6a936494768C9F4dbaA7b6D299A8","ticker":"SMCI","verdict":{"Verified":{"issuer":"Robinhood","ticker":"SMCI"}},"version":1}

Signature

TROobZvthPOsk9FGO3ajC1hlIHS3Afwzlgu2l5AlUth+i0WMcBG5HAkG6azrNgFk6/dS7yMUSQoUvNrTmYxUDA==

API call

GET /api/attest/352c931425495f9f180d7ed1efca5fcc1fed2c9005ca8b27d0e31d117b91c24e

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.