USDG/QQQ

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":76124594,"chain":"RobinhoodChain","checked_at":"2026-09-30T01:31:41Z","dev":false,"expires_at":"2026-10-01T01:31:41Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"507133084183","decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xD60A5d14dB690B7Afad71F76B108071D7175597d","quote":{"address":"0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","balance":"1074999830051062169501","decimals":18,"symbol":"QQQ"}},"quote_share_of_supply":0.1538537238337257,"reads":[{"block":null,"method":"eth_getCode","params":["0xD60A5d14dB690B7Afad71F76B108071D7175597d","latest"],"result_hash":"d9e5a8c0aff2be2220a2d318414564d06a1117eef50115a3167329625f89c45c","slot":null},{"block":76124594,"method":"eth_blockNumber","params":[],"result_hash":"908106dfab773a5a4b01374dabe4524a880d40d4bf04e202a56ce94ea2c4c018","slot":null},{"block":null,"method":"eth_call","params":["0xD60A5d14dB690B7Afad71F76B108071D7175597d","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xD60A5d14dB690B7Afad71F76B108071D7175597d","token1()"],"raw_result":"0xd5f3879160bc7c32ebb4dc785f8a4f505888de68","result_hash":"9bd90eb85ea7836838fa3000d9a6c13f6bb646cc5344fd844e58a4bf85e2a67f","slot":null},{"block":null,"method":"eth_call","params":["0xD60A5d14dB690B7Afad71F76B108071D7175597d","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xD60A5d14dB690B7Afad71F76B108071D7175597d","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xD60A5d14dB690B7Afad71F76B108071D7175597d","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","0xD60A5d14dB690B7Afad71F76B108071D7175597d"],"raw_result":"Some(\"507133084183\")","result_hash":"507dde8d405604526c8963491224913105c29face265a9ad439043e1be9fad17","slot":null},{"block":null,"method":"eth_call","params":["0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","symbol()"],"raw_result":"Some(\"QQQ\")","result_hash":"3484733d4c72ec171630e7c55163bd00f2a50a818074ea0bde42a199df42cadb","slot":null},{"block":null,"method":"eth_call","params":["0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","balanceOf","0xD60A5d14dB690B7Afad71F76B108071D7175597d"],"raw_result":"Some(\"1074999830051062169501\")","result_hash":"dbbb4dc38d1a9f4b88391f58b0d464ea504c2517966a8120feb45f0a13c2870d","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(\"683662524812848\")","result_hash":"8620da09856e735a919b324b7f40e64058937062508d6640d23c3698e6bfbd82","slot":null},{"block":null,"method":"eth_call","params":["0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","symbol()"],"raw_result":"Some(\"QQQ\")","result_hash":"3484733d4c72ec171630e7c55163bd00f2a50a818074ea0bde42a199df42cadb","slot":null},{"block":null,"method":"eth_call","params":["0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","name()"],"raw_result":"Some(\"Invesco QQQ • Robinhood Token\")","result_hash":"d3667227e735e48c9eceb564152fba2b7f5ddfa823fb19e531daf7024b9b03f0","slot":null},{"block":null,"method":"eth_call","params":["0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","totalSupply()"],"raw_result":"Some(\"6987155092930000000000\")","result_hash":"3bfdfe2c69edb0e2e0777e9da5d1743fabb82257baf9a9bdececb04775eada6b","slot":null},{"block":null,"method":"eth_call","params":["0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","uiMultiplier()"],"raw_result":"1000700791241405425","result_hash":"b37529cae6d6cc0e9a51d27ebcccf454ac68f582f8c74195dbfd6e7170317a93","slot":null},{"block":null,"method":"eth_getCode","params":["0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0xD5f3879160bc7c32ebb4dC785F8a4F505888de68","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-30T00:37:24Z","name":"Invesco QQQ","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"QQQ"},"registry_hash":"5524ad353114ce82e4459bdb0533016e63f15d54f628b91498b20cf2b964d0de","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xD60A5d14dB690B7Afad71F76B108071D7175597d","ticker":"QQQ","verdict":{"Verified":{"issuer":"Robinhood","ticker":"QQQ"}},"version":1}

Signature

c7vq91atsuccF0v0HdcfHl/R/mCGTsZxz965VmAym0zS+gzkwXgoOjaLwdHsts3eqJPyIs0YS0yqlEJlEV5BCg==

API call

GET /api/attest/323fef13eedce0ef73040fb6e7111b5003f054f306a61b9ea3e5056613699936

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.