USDG/POET

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":76161915,"chain":"RobinhoodChain","checked_at":"2026-09-30T02:34:13Z","dev":false,"expires_at":"2026-10-01T02:34:13Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"288158117","decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xa1C781ed62AC2d0283f50fF5A843647a56ddd80a","quote":{"address":"0xcf6B2D875361be807EAfa57458c80f28521F9333","balance":"76962638748961759735","decimals":18,"symbol":"POET"}},"quote_share_of_supply":0.030999597514060014,"reads":[{"block":null,"method":"eth_getCode","params":["0xa1C781ed62AC2d0283f50fF5A843647a56ddd80a","latest"],"result_hash":"211ac805ed7db0e5a946dd34f3df414d73460933f40ce698462273c8aad903ca","slot":null},{"block":76161915,"method":"eth_blockNumber","params":[],"result_hash":"4ac0587aa45dadc60f8429477c38e782b0f8e45f2071fa982eafa0b2e58fcbd9","slot":null},{"block":null,"method":"eth_call","params":["0xa1C781ed62AC2d0283f50fF5A843647a56ddd80a","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xa1C781ed62AC2d0283f50fF5A843647a56ddd80a","token1()"],"raw_result":"0xcf6b2d875361be807eafa57458c80f28521f9333","result_hash":"5c01ac4022e7de947160884efd1a3dfeffc8785b41ab23eee434321ff566b050","slot":null},{"block":null,"method":"eth_call","params":["0xa1C781ed62AC2d0283f50fF5A843647a56ddd80a","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xa1C781ed62AC2d0283f50fF5A843647a56ddd80a","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xa1C781ed62AC2d0283f50fF5A843647a56ddd80a","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","0xa1C781ed62AC2d0283f50fF5A843647a56ddd80a"],"raw_result":"Some(\"288158117\")","result_hash":"b78cb3360fbc799220fa41e4da351229e4ed822f62b14967d1a3c690e6ebd719","slot":null},{"block":null,"method":"eth_call","params":["0xcf6B2D875361be807EAfa57458c80f28521F9333","symbol()"],"raw_result":"Some(\"POET\")","result_hash":"60af00760c5720579fa645648a3df724950bd00d68652bc68495a15605c1794b","slot":null},{"block":null,"method":"eth_call","params":["0xcf6B2D875361be807EAfa57458c80f28521F9333","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xcf6B2D875361be807EAfa57458c80f28521F9333","balanceOf","0xa1C781ed62AC2d0283f50fF5A843647a56ddd80a"],"raw_result":"Some(\"76962638748961759735\")","result_hash":"d7088bb5b44135b7aebd7826fc98fef17b7a5353af91cc240c18e6b313f3ebfa","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(\"684321880833512\")","result_hash":"1880422df23785ad1c6176a90c35a8678b6a1bdf0c27fabfc7074ae79d6d7ea1","slot":null},{"block":null,"method":"eth_call","params":["0xcf6B2D875361be807EAfa57458c80f28521F9333","symbol()"],"raw_result":"Some(\"POET\")","result_hash":"60af00760c5720579fa645648a3df724950bd00d68652bc68495a15605c1794b","slot":null},{"block":null,"method":"eth_call","params":["0xcf6B2D875361be807EAfa57458c80f28521F9333","name()"],"raw_result":"Some(\"POET Technologies • Robinhood Token\")","result_hash":"11378a8c62491153c42f72f69e66242b619ff9490b080e016beb600b2ae03ab8","slot":null},{"block":null,"method":"eth_call","params":["0xcf6B2D875361be807EAfa57458c80f28521F9333","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xcf6B2D875361be807EAfa57458c80f28521F9333","totalSupply()"],"raw_result":"Some(\"2482698000000000000000\")","result_hash":"c80a0ad0d0b82e1f895ec76611cb1bee677f98624859c857273283a92eacd234","slot":null},{"block":null,"method":"eth_call","params":["0xcf6B2D875361be807EAfa57458c80f28521F9333","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0xcf6B2D875361be807EAfa57458c80f28521F9333","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xcf6B2D875361be807EAfa57458c80f28521F9333","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0xcf6B2D875361be807EAfa57458c80f28521F9333","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-30T01:37:24Z","name":"POET Technologies","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"POET"},"registry_hash":"abef97b3ad2938b7051778363de6a051cdf8518e229b4f37504bec93f04b4868","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xa1C781ed62AC2d0283f50fF5A843647a56ddd80a","ticker":"POET","verdict":{"Verified":{"issuer":"Robinhood","ticker":"POET"}},"version":1}

Signature

C41KVIY8z90pl1Iv9ys4T4TOnYUGanESLN2lr9etT9CyTPXJcMT7RG3m4+ZEsgUrsUQ6ia0XYXHogHoljM6sAQ==

API call

GET /api/attest/734a57536a69b4e3a755c9784e8557a99d6655d30dcd2b65562966e0c5d23025

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.