USDG/USO

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":76077116,"chain":"RobinhoodChain","checked_at":"2026-09-30T00:12:13Z","dev":false,"expires_at":"2026-10-01T00:12:14Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"585729544632","decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0x02175608F1b5E6b5ed221cCFdC7Be197D111D915","quote":{"address":"0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","balance":"9530117241388517402274","decimals":18,"symbol":"USO"}},"quote_share_of_supply":0.4826918978311909,"reads":[{"block":null,"method":"eth_getCode","params":["0x02175608F1b5E6b5ed221cCFdC7Be197D111D915","latest"],"result_hash":"91dc3d10f99e18d55022c67ffd47accc670020fadeff5e80337fa078ebd95e10","slot":null},{"block":76077116,"method":"eth_blockNumber","params":[],"result_hash":"534f6eada3701867df7326bdc317432d36e010fd5e151f289c47e2ddc569e0e2","slot":null},{"block":null,"method":"eth_call","params":["0x02175608F1b5E6b5ed221cCFdC7Be197D111D915","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x02175608F1b5E6b5ed221cCFdC7Be197D111D915","token1()"],"raw_result":"0xa30fa36db767ad9ed3f7a60fc79526fb4d56d344","result_hash":"be3656a1fe219c36b8e797f9ca76a30a07b477ba9888d5c4062d0279ce618d62","slot":null},{"block":null,"method":"eth_call","params":["0x02175608F1b5E6b5ed221cCFdC7Be197D111D915","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x02175608F1b5E6b5ed221cCFdC7Be197D111D915","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x02175608F1b5E6b5ed221cCFdC7Be197D111D915","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","0x02175608F1b5E6b5ed221cCFdC7Be197D111D915"],"raw_result":"Some(\"585729544632\")","result_hash":"8911436d9201cd0a3698d4ee675e1d6178545386dd13837fd4c46f1d762ce984","slot":null},{"block":null,"method":"eth_call","params":["0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","symbol()"],"raw_result":"Some(\"USO\")","result_hash":"04836eebdc7b29e6e8d354377fa7b7fbae57302e0f1086f06bcc9b436e40dc27","slot":null},{"block":null,"method":"eth_call","params":["0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","balanceOf","0x02175608F1b5E6b5ed221cCFdC7Be197D111D915"],"raw_result":"Some(\"9530117241388517402274\")","result_hash":"f405971db2cb5bd9c60e9069cc6f807745e914f460454cb26b1d691e1f7f0930","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(\"683325776947610\")","result_hash":"a815c1df2c698888004394fe61ac9e516acfc955c33643a5b5c0612290e85830","slot":null},{"block":null,"method":"eth_call","params":["0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","symbol()"],"raw_result":"Some(\"USO\")","result_hash":"04836eebdc7b29e6e8d354377fa7b7fbae57302e0f1086f06bcc9b436e40dc27","slot":null},{"block":null,"method":"eth_call","params":["0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","name()"],"raw_result":"Some(\"United States Oil Fund • Robinhood Token\")","result_hash":"d6ef0e5af0d16de7108e9625cb74b8db07987659dd0be98480b914b0eee31080","slot":null},{"block":null,"method":"eth_call","params":["0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","totalSupply()"],"raw_result":"Some(\"19743685950000000000000\")","result_hash":"2bcc9bf3bc420294bd7f9cccb4c4cdc7e85d885a8279ae6e7b58a36901056d07","slot":null},{"block":null,"method":"eth_call","params":["0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0xa30FA36Db767ad9eD3f7a60fC79526fB4d56D344","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-29T23:37:24Z","name":"United States Oil Fund","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"USO"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x02175608F1b5E6b5ed221cCFdC7Be197D111D915","ticker":"USO","verdict":{"Verified":{"issuer":"Robinhood","ticker":"USO"}},"version":1}

Signature

XEAa/xhVxSjVVwHgh/47E77s4xRWZv9f24cJ0KOac3FO/tbBd1+vXcFS1y+0UWAwzn8TDThlh7Cpwp2C5Z9HAg==

API call

GET /api/attest/0c2061c67e7e8f719c2404efba073471e3dcec1eee5fc95467335e8d0c69d006

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.