USDG/USAR

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":76128451,"chain":"RobinhoodChain","checked_at":"2026-09-30T01:38:09Z","dev":false,"expires_at":"2026-10-01T01:38:09Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"7766924090","decimals":6,"symbol":"USDG"},"chain":"RobinhoodChain","dex":"uniswap-v3","pool":"0x04391780F519B7d3ba59c9590459D76e23d225C4","quote":{"address":"0xd917B029C761D264c6A312BBbcDA868658eF86a6","balance":"4193252940722634317950","decimals":18,"symbol":"USAR"}},"quote_share_of_supply":0.10530742874989903,"reads":[{"block":null,"method":"eth_getCode","params":["0x04391780F519B7d3ba59c9590459D76e23d225C4","latest"],"result_hash":"44f13a529b2077a56487a353b1752ecdef6e938c89086cfef9fa06bbf5f20c33","slot":null},{"block":76128451,"method":"eth_blockNumber","params":[],"result_hash":"cdc0800d46e73df2372f660c369e7a9f7958673fcce6875f932af4b49a47d58b","slot":null},{"block":null,"method":"eth_call","params":["0x04391780F519B7d3ba59c9590459D76e23d225C4","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0x04391780F519B7d3ba59c9590459D76e23d225C4","token1()"],"raw_result":"0xd917b029c761d264c6a312bbbcda868658ef86a6","result_hash":"0d0f8458f3f0f85dd32e20f3f159bfd09dfd0aa45ff805c83194572469a4b8e3","slot":null},{"block":null,"method":"eth_call","params":["0x04391780F519B7d3ba59c9590459D76e23d225C4","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x04391780F519B7d3ba59c9590459D76e23d225C4","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x04391780F519B7d3ba59c9590459D76e23d225C4","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","0x04391780F519B7d3ba59c9590459D76e23d225C4"],"raw_result":"Some(\"7766924090\")","result_hash":"113b1c524368f026f9772a4c26806500a83cbd2038ebb7786df1c9fa2cfb4701","slot":null},{"block":null,"method":"eth_call","params":["0xd917B029C761D264c6A312BBbcDA868658eF86a6","symbol()"],"raw_result":"Some(\"USAR\")","result_hash":"0a9fb797779220f6632f372c4bb5659e81910e3fbd8ebf7e56e113db1a908ade","slot":null},{"block":null,"method":"eth_call","params":["0xd917B029C761D264c6A312BBbcDA868658eF86a6","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xd917B029C761D264c6A312BBbcDA868658eF86a6","balanceOf","0x04391780F519B7d3ba59c9590459D76e23d225C4"],"raw_result":"Some(\"4193252940722634317950\")","result_hash":"b6730f227a0782ef5e94044b76473cff1839fed866e40046bb4f4890c0a372ac","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(\"684206116727748\")","result_hash":"c28c2840d974e7edbc2a78b90480774f945654809c745dedb1dcb4e21aaea62f","slot":null},{"block":null,"method":"eth_call","params":["0xd917B029C761D264c6A312BBbcDA868658eF86a6","symbol()"],"raw_result":"Some(\"USAR\")","result_hash":"0a9fb797779220f6632f372c4bb5659e81910e3fbd8ebf7e56e113db1a908ade","slot":null},{"block":null,"method":"eth_call","params":["0xd917B029C761D264c6A312BBbcDA868658eF86a6","name()"],"raw_result":"Some(\"USA Rare Earth • Robinhood Token\")","result_hash":"85f9dcd711f3bde98f38444b90e569a7755522eb8f31568dc7dc8ec9a1640c8d","slot":null},{"block":null,"method":"eth_call","params":["0xd917B029C761D264c6A312BBbcDA868658eF86a6","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xd917B029C761D264c6A312BBbcDA868658eF86a6","totalSupply()"],"raw_result":"Some(\"39819156070000000000000\")","result_hash":"2941f5090f85f01cba45602c811ffa75d6554ed4eda9e430d82a01f077443cf3","slot":null},{"block":null,"method":"eth_call","params":["0xd917B029C761D264c6A312BBbcDA868658eF86a6","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0xd917B029C761D264c6A312BBbcDA868658eF86a6","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xd917B029C761D264c6A312BBbcDA868658eF86a6","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"RobinhoodChain","contract":"0xd917B029C761D264c6A312BBbcDA868658eF86a6","decimals":18,"issuer":"Robinhood","last_checked":"2026-09-30T01:37:24Z","name":"USA Rare Earth","source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"USAR"},"registry_hash":"abef97b3ad2938b7051778363de6a051cdf8518e229b4f37504bec93f04b4868","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x04391780F519B7d3ba59c9590459D76e23d225C4","ticker":"USAR","verdict":{"Verified":{"issuer":"Robinhood","ticker":"USAR"}},"version":1}

Signature

aSUsksWEtcW7BEoh++mz8SP12NksEJBwfMp98EoFuKpcf88xCTjcDhpR6FpYID+wkXyB6Jun7Dm92axu6+6/Cg==

API call

GET /api/attest/815fa4a6f31ba1dc35c9fdd21fefb5d492ade234f2fa64f3075c0d270504329a

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.