Does MU / USDG match its issuer's published contract?

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":94500784,"chain":"robinhood","checked_at":"2026-10-21T18:45:08Z","dev":false,"expires_at":"2026-10-22T18:45:08Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"280774801236","decimals":6,"symbol":"USDG"},"chain":"robinhood","dex":"uniswap-v3","pool":"0xd057B1Bc54917855BBee58eAd58647f47caB35E5","quote":{"address":"0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","balance":"1149927259419213278725","decimals":18,"symbol":"MU"}},"quote_share_of_supply":0.21976246312336026,"reads":[{"block":94500784,"method":"eth_blockNumber","params":[],"result_hash":"3c4a4a928c8026b965126a5d85267e51612628b7de18f3b9df356310cbee1cb7","slot":null},{"block":null,"method":"eth_call","params":["0xd057B1Bc54917855BBee58eAd58647f47caB35E5","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xd057B1Bc54917855BBee58eAd58647f47caB35E5","token1()"],"raw_result":"0xff080c8ce2e5feadaca0da81314ae59d232d4afd","result_hash":"e8a5ea87b28109775a933639db95ddd918b3ac3acd4c9290a2d3b7f91517f7a1","slot":null},{"block":null,"method":"eth_call","params":["0xd057B1Bc54917855BBee58eAd58647f47caB35E5","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xd057B1Bc54917855BBee58eAd58647f47caB35E5","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xd057B1Bc54917855BBee58eAd58647f47caB35E5","factory()"],"raw_result":"0x1f7d7550b1b028f7571e69a784071f0205fd2efa","result_hash":"bf7614e6e838b22e4363dfcb3022451641875235ca13e64f8d2d8c3334ff85f3","slot":null},{"block":null,"method":"eth_call","params":["0xd057B1Bc54917855BBee58eAd58647f47caB35E5","fee()"],"raw_result":"3000","result_hash":"53232d7da9fd2a1931dcd44af08ec415dd52ab8ecc4037ef5e68eb3753978a2e","slot":null},{"block":null,"method":"eth_call","params":["0x1f7d7550B1b028f7571E69A784071F0205FD2EfA","getPool","0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","0xbb8"],"raw_result":"0xd057b1bc54917855bbee58ead58647f47cab35e5","result_hash":"28a778fc7d0008bed809c9a7d03e20b9ba836f7a650db655ad25613f786c4776","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","0xd057B1Bc54917855BBee58eAd58647f47caB35E5"],"raw_result":"Some(\"280774801236\")","result_hash":"4fde4562f6b53fab15d92644241941798e9e009ea425b1a61dee231bc6004842","slot":null},{"block":null,"method":"eth_call","params":["0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","symbol()"],"raw_result":"Some(\"MU\")","result_hash":"5e930b4625ab639df3d00a55c6129e7402c2b0b0a3e84549fe37e430cd3e9e20","slot":null},{"block":null,"method":"eth_call","params":["0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","balanceOf","0xd057B1Bc54917855BBee58eAd58647f47caB35E5"],"raw_result":"Some(\"1149927259419213278725\")","result_hash":"3df8f5b8d14f9613b2193c462feeeeba73779ee088a82d5c10bdcd8c82fdf28e","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(\"714867490888367\")","result_hash":"0b40eecc4f37eb3cb1518305edb468eadecffc64caac3b62ed18c2ae31eab0aa","slot":null},{"block":null,"method":"eth_call","params":["0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","symbol()"],"raw_result":"Some(\"MU\")","result_hash":"5e930b4625ab639df3d00a55c6129e7402c2b0b0a3e84549fe37e430cd3e9e20","slot":null},{"block":null,"method":"eth_call","params":["0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","name()"],"raw_result":"Some(\"Micron Technology • Robinhood Token\")","result_hash":"03e3451259c7ed7df959af52f1f50b5cf9325020eb7a7a19b44736ae35369a8e","slot":null},{"block":null,"method":"eth_call","params":["0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","totalSupply()"],"raw_result":"Some(\"5232591786040000000000\")","result_hash":"1dad3ee2f55fc62e1a516fb5427f232b3885f1bf4daa7d8513645a54f324561b","slot":null},{"block":null,"method":"eth_call","params":["0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","uiMultiplier()"],"raw_result":"1000183456682946507","result_hash":"0437d8ea4dbabe6ace3bfe326a0e4c926b21e02da3ad7a6d4aec31ca61d64c8d","slot":null},{"block":null,"method":"eth_getCode","params":["0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"robinhood","contract":"0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-21T18:40:19Z","name":"Micron Technology","official_deployments":[{"address":"0xfF080c8ce2E5feadaCa0Da81314Ae59D232d4afD","network":"Robinhood Chain"}],"source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"MU"},"registry_hash":"d2b23738a0957d6535d8cddb63373ceb6c6c963a51ba306222a0752fa56fc433","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xd057B1Bc54917855BBee58eAd58647f47caB35E5","ticker":"MU","verdict":{"Verified":{"issuer":"Robinhood","ticker":"MU"}},"version":1}

Signature

NgXQxYt9kS8i7BhfC3q6WAktIb73+9SRlBFgAEGzLqmlAbEvkHPOarCnkqznvQ//XrHFW5dS1HK8mmdCGb9QAA==

API call

GET /api/attest/5fce6bfe45623b7e7d9cbaeb22af8415899b21bee54ae41206861fdaa23141ba

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.