USDG/SKHY

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":79911302,"chain":"RobinhoodChain","checked_at":"2026-10-04T11:47:57Z","dev":false,"expires_at":"2026-10-05T11:47:57Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"17209519059","decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0x5F2a5025feb93a4C44DA4E3B37e4fD3Fb0ab5171","quote":{"address":"0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","balance":"41540168260711152756","decimals":18,"symbol":"SKHY"}},"quote_share_of_supply":0.007037584445412783,"reads":[{"block":null,"method":"eth_getCode","params":["0x5F2a5025feb93a4C44DA4E3B37e4fD3Fb0ab5171","latest"],"result_hash":"1818ea48f9c2c27576a6029305d3e2b85c4f471a317142029b8bd67c139d90c4","slot":null},{"block":79911302,"method":"eth_blockNumber","params":[],"result_hash":"4074be07ef778d8e791a7990a18161176bd69666446d82e551d1d56048464596","slot":null},{"block":null,"method":"eth_call","params":["0x5F2a5025feb93a4C44DA4E3B37e4fD3Fb0ab5171","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x5F2a5025feb93a4C44DA4E3B37e4fD3Fb0ab5171","token1()"],"raw_result":"0x84cab63bc87912e71ad199ff14a0ba45de68fef8","result_hash":"e7040f79aff61d2eaf03255cc955d8fd76e7874d3a7e124314fced0632191c9f","slot":null},{"block":null,"method":"eth_call","params":["0x5F2a5025feb93a4C44DA4E3B37e4fD3Fb0ab5171","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x5F2a5025feb93a4C44DA4E3B37e4fD3Fb0ab5171","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x5F2a5025feb93a4C44DA4E3B37e4fD3Fb0ab5171","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","0x5F2a5025feb93a4C44DA4E3B37e4fD3Fb0ab5171"],"raw_result":"Some(\"17209519059\")","result_hash":"d58eafa7da695f1b0a8cc60fb1147236545e963bdbb13165cfc68190c07aaa7f","slot":null},{"block":null,"method":"eth_call","params":["0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","symbol()"],"raw_result":"Some(\"SKHY\")","result_hash":"285ba5a6f5e3f82d50c0f0874e21e2e90434be7aa2cfc147e35c271961bc8bc5","slot":null},{"block":null,"method":"eth_call","params":["0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","balanceOf","0x5F2a5025feb93a4C44DA4E3B37e4fD3Fb0ab5171"],"raw_result":"Some(\"41540168260711152756\")","result_hash":"42c14122a72c6a5b926652023dcd270aff9e465870275f7db5e79b95cbbfd882","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(\"694089123708289\")","result_hash":"71f221f58866884090f4897698b230c9d4bfb698107eef7482d4a204b5598b4b","slot":null},{"block":null,"method":"eth_call","params":["0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","symbol()"],"raw_result":"Some(\"SKHY\")","result_hash":"285ba5a6f5e3f82d50c0f0874e21e2e90434be7aa2cfc147e35c271961bc8bc5","slot":null},{"block":null,"method":"eth_call","params":["0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","name()"],"raw_result":"Some(\"SK hynix Inc. American Depositary Shares • Robinhood Token\")","result_hash":"b48e089682245a6618dc17c95b723be6a257f9f8203fbee1836788694619c7e1","slot":null},{"block":null,"method":"eth_call","params":["0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","totalSupply()"],"raw_result":"Some(\"5902617380000000000000\")","result_hash":"e8760354ce29a498c1665af297cb3d1335f46c35d9c87a2f568e3ac2f10ae6d8","slot":null},{"block":null,"method":"eth_call","params":["0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x84CAb63bc87912E71ad199ff14A0bA45de68FeF8","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-04T11:14:21Z","name":"SK hynix Inc. American Depositary Shares","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"SKHY"},"registry_hash":"55543f836fdeaf026cdc0661430057c8a18f3ab70335b8385b2134319139f5f2","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x5F2a5025feb93a4C44DA4E3B37e4fD3Fb0ab5171","ticker":"SKHY","verdict":{"Verified":{"issuer":"Robinhood","ticker":"SKHY"}},"version":1}

Signature

8zajYO3U6OZ13McMm7nl6hHLDzp5cxjqnZYDvFbB53E3NjBki+TbOE2WSti+bJdhqDPILNoXk0LssEYS/RT/DQ==

API call

GET /api/attest/8b946c8a90bb26374ee7798b5996b4c3e5e40fe6d9abe497da39dcbdbc448ef4

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.