USDG/GLD

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":76029875,"chain":"RobinhoodChain","checked_at":"2026-09-29T22:53:25Z","dev":false,"expires_at":"2026-09-30T22:53:25Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"255756810532","decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xBA2f1ed4cEB2169D538d1e614D847E83C5A55913","quote":{"address":"0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","balance":"3103772566131394021891","decimals":18,"symbol":"GLD"}},"quote_share_of_supply":0.1332410443618003,"reads":[{"block":null,"method":"eth_getCode","params":["0xBA2f1ed4cEB2169D538d1e614D847E83C5A55913","latest"],"result_hash":"5606fa343f7d6acaea8145a9ebbedcb926264761b01141cf0b1a5d4c641e341a","slot":null},{"block":76029875,"method":"eth_blockNumber","params":[],"result_hash":"12e7654a49b86317d399cc137949f98f1d623721d76a21c6eae841833f6044e8","slot":null},{"block":null,"method":"eth_call","params":["0xBA2f1ed4cEB2169D538d1e614D847E83C5A55913","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xBA2f1ed4cEB2169D538d1e614D847E83C5A55913","token1()"],"raw_result":"0xc9a981fee1f9dec688bb123ccdecc63d0debfc4e","result_hash":"99aa527799a5c0da77c5cfd6d7c1de5bafb9738bcb6da370d88445bccfbf03c2","slot":null},{"block":null,"method":"eth_call","params":["0xBA2f1ed4cEB2169D538d1e614D847E83C5A55913","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xBA2f1ed4cEB2169D538d1e614D847E83C5A55913","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xBA2f1ed4cEB2169D538d1e614D847E83C5A55913","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","0xBA2f1ed4cEB2169D538d1e614D847E83C5A55913"],"raw_result":"Some(\"255756810532\")","result_hash":"2884890f630af55198b276333a081a06a14ca6ab19f35719814354e7cd9b965a","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","symbol()"],"raw_result":"Some(\"GLD\")","result_hash":"b3bfe63bf387db068fb1b240a7b959fa983a7df54741c9264d1993cd7cc1fcc7","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","balanceOf","0xBA2f1ed4cEB2169D538d1e614D847E83C5A55913"],"raw_result":"Some(\"3103772566131394021891\")","result_hash":"04a85fe51d58d9d07baf73eb2264446cc991d562063f75707ed55b0dace132cf","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(\"683754660025993\")","result_hash":"0e4bacc4bdcf383c2fae40fbb3d330d8ebf51d9ae7e838f6db679ff12c3f7419","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","symbol()"],"raw_result":"Some(\"GLD\")","result_hash":"b3bfe63bf387db068fb1b240a7b959fa983a7df54741c9264d1993cd7cc1fcc7","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","name()"],"raw_result":"Some(\"SPDR Gold Trust • Robinhood Token\")","result_hash":"f93e660f129f86e8187e4fb708f6fc96e69642a7305f8b2289053bf57013c23b","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","totalSupply()"],"raw_result":"Some(\"23294417880000000000000\")","result_hash":"0c105de182bbc4350d322e4c7d4cf817199b61e7e972d757d9602f099311a426","slot":null},{"block":null,"method":"eth_call","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0xC9a981FEE1F9DEc688bb123ccDeCc63D0deBFC4e","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-29T22:37:24Z","name":"SPDR Gold Trust","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"GLD"},"registry_hash":"d6272adf0af69a1c2c18f6a79db79616f69be8189283a420b5ba6e572aa0e4ad","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xBA2f1ed4cEB2169D538d1e614D847E83C5A55913","ticker":"GLD","verdict":{"Verified":{"issuer":"Robinhood","ticker":"GLD"}},"version":1}

Signature

uUKNAarzmDj6wOcTLHkevucd4bZZlLhHy08v34ZVcs/Y52ZtJdOEoAu9BlpZfLIWRPxS1HMjGhne2+ybWpNKAw==

API call

GET /api/attest/707740d597aa2e080119e81deb319ffc82c36d5abc493e348c6877e72ae43b8e

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.