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":76124102,"chain":"RobinhoodChain","checked_at":"2026-09-30T01:31:13Z","dev":false,"expires_at":"2026-10-01T01:31:13Z","issuer":"Robinhood","pool":{"base":{"address":"0x1b0E319c6A659F002271B69dB8A7df2F911c153E","balance":"3771629072434312294375","decimals":18,"symbol":"GME"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","quote":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"102561277411","decimals":6,"symbol":"USDG"}},"quote_share_of_supply":0.026554947374123856,"reads":[{"block":null,"method":"eth_getCode","params":["0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","latest"],"result_hash":"4d8c4eb47ca677a19b95afd75e604bfe93052530b3588fad598efc4c23e773f8","slot":null},{"block":76124102,"method":"eth_blockNumber","params":[],"result_hash":"bfd7048039bf2d6a38f16767cfaac65fd79f10171638369de2b51312043c97ea","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":"None","result_hash":"f2953d2931e36d0c55640f51865f8394ebe52194765d04e521017232558f871c","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(\"3771629072434312294375\")","result_hash":"08fe12007a6c6dca3fa15a9f8be335def22105610e408a6dfd91fd3988e0414b","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(\"102561277411\")","result_hash":"baa90d303a3f508ec220bbf7edc90377fd12c7e56e30b9843ad32dd95208756f","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":["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(\"142031125850000000000000\")","result_hash":"93c3291489f0b4e191912c62eabcb1293bf7562dcc302a88c552d5515722919e","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":"2026-09-30T00:37:24Z","name":"GameStop","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"GME"},"registry_hash":"5524ad353114ce82e4459bdb0533016e63f15d54f628b91498b20cf2b964d0de","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xE2b46c905E12Ab8E2f864e4821a4325884C1B126","ticker":"GME","verdict":{"Verified":{"issuer":"Robinhood","ticker":"GME"}},"version":1}

Signature

9J1zqfGbeKUia9N6622169ZQ2EbyuLuzZL8MGzgdXLm616qNvv2aYWc6M2XdiTrPKnaptqBujyznpdhO6cR0Bw==

API call

GET /api/attest/7a89aa89b3ee0fd5691cc50a9fbd8babeedd22bffd7b3344b952113457b5c71c

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.