GME/USDG

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":76030390,"chain":"RobinhoodChain","checked_at":"2026-09-29T22:54:21Z","dev":false,"expires_at":"2026-09-30T22:54:21Z","issuer":"Robinhood","pool":{"base":{"address":"0x1b0E319c6A659F002271B69dB8A7df2F911c153E","balance":"3755874918970454149278","decimals":18,"symbol":"GME"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"101574578175","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.026415701283413515,"reads":[{"block":null,"method":"eth_getCode","params":["0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","latest"],"result_hash":"4d8c4eb47ca677a19b95afd75e604bfe93052530b3588fad598efc4c23e773f8","slot":null},{"block":76030390,"method":"eth_blockNumber","params":[],"result_hash":"2899bcb3679790586e5ad4bb130a4d805b144c0ae8a4ce88c5238c5ab57e84a2","slot":null},{"block":null,"method":"eth_call","params":["0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","token0()"],"raw_result":"0x1b0e319c6a659f002271b69db8a7df2f911c153e","result_hash":"7f260c2091af04e162421fe48174d3eee5a138d1ed4c84676249953f5831f7d8","slot":null},{"block":null,"method":"eth_call","params":["0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","token1()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","factory()"],"raw_result":"Some(0x1f7d7550b1b028f7571e69a784071f0205fd2efa)","result_hash":"3a5325de1b5dc50662a9e2ec44d8428ded4306d2bd46195f62299474690e30aa","slot":null},{"block":null,"method":"eth_call","params":["0x1b0E319c6A659F002271B69dB8A7df2F911c153E","symbol()"],"raw_result":"Some(\"GME\")","result_hash":"b5e811c6f60f96381313c3e97216848dbd5afc84841cfce6e56c7cb9e64886a3","slot":null},{"block":null,"method":"eth_call","params":["0x1b0E319c6A659F002271B69dB8A7df2F911c153E","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x1b0E319c6A659F002271B69dB8A7df2F911c153E","balanceOf","0xE2b46c905E12Ab8E2f864e4821a4325884C1B126"],"raw_result":"Some(\"3755874918970454149278\")","result_hash":"b9d13ec4da78b6c9059de020558fa91f984dc854065590938bf7daa03ae71003","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","0xE2b46c905E12Ab8E2f864e4821a4325884C1B126"],"raw_result":"Some(\"101574578175\")","result_hash":"3244d01752de637282ad486ab11e28235f02a2401cb6856c313340d354087f72","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":["0x1b0E319c6A659F002271B69dB8A7df2F911c153E","symbol()"],"raw_result":"Some(\"GME\")","result_hash":"b5e811c6f60f96381313c3e97216848dbd5afc84841cfce6e56c7cb9e64886a3","slot":null},{"block":null,"method":"eth_call","params":["0x1b0E319c6A659F002271B69dB8A7df2F911c153E","name()"],"raw_result":"Some(\"GameStop • Robinhood Token\")","result_hash":"8fad0f145b3a7345b1b79c395e706316edf2e778b8bfbd9103376ef11ffe9b19","slot":null},{"block":null,"method":"eth_call","params":["0x1b0E319c6A659F002271B69dB8A7df2F911c153E","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x1b0E319c6A659F002271B69dB8A7df2F911c153E","totalSupply()"],"raw_result":"Some(\"142183426390000000000000\")","result_hash":"539c75634fe1ced23bbf93eed09ee08fd3a60e4018f808f9a8d133a122905082","slot":null},{"block":null,"method":"eth_call","params":["0x1b0E319c6A659F002271B69dB8A7df2F911c153E","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0x1b0E319c6A659F002271B69dB8A7df2F911c153E","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0x1b0E319c6A659F002271B69dB8A7df2F911c153E","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0x1b0E319c6A659F002271B69dB8A7df2F911c153E","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-29T22:37:24Z","name":"GameStop","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"GME"},"registry_hash":"d6272adf0af69a1c2c18f6a79db79616f69be8189283a420b5ba6e572aa0e4ad","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","ticker":"GME","verdict":{"Verified":{"issuer":"Robinhood","ticker":"GME"}},"version":1}

Signature

uYp70jRxFIdVl2qDK8XDW54CE3O8aYbOzdUrH5k2Y8lrbmtSg+c0oCe2SMuPDQashsIWFHBJ3UEVEf9PFJq9AQ==

API call

GET /api/attest/1169435355e5e3fd2fe664288b8580b540339022c8c680f6be31aee777033d5d

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.