UBERx/Unknown

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":null,"chain":"Solana","checked_at":"2026-09-30T00:26:49Z","dev":false,"expires_at":"2026-10-01T00:26:49Z","issuer":"Backed xStocks","pool":{"base":{"address":"XsAsZLF4MmsvS1sDxRMrUz7REjHfwbC9UAMXSRBqgEB","balance":"767783585","decimals":8,"symbol":"UBERx"},"chain":"Solana","dex":"orca-whirlpool","pool":"Grbgeue4XL4M5tcw6vJ7YZv7CtbwaqLDGgpCAAt35M3q","quote":{"address":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","balance":"544556562","decimals":6,"symbol":null}},"quote_share_of_supply":0.00003957647437996907,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"777bd5366a67b322d28e9a79723f342d902c69d2caf132593772d3547783186d","slot":451802499},{"block":null,"method":"getAccountInfo","params":["Grbgeue4XL4M5tcw6vJ7YZv7CtbwaqLDGgpCAAt35M3q",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451802500},"value":{"data":["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","base64"],"executable":false,"lamports":3967480,"owner":"whirLbMiicVdio4qvUfM5KAg6Ct8VwpYzGff3uctyCc","rentEpoch":18446744073709551615,"space":653}},"result_hash":"0ce9dfd111fbe0cbe9d6776ca82ef423efa2b06bc825b404ebd1f70ce8a56c35","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["52UL9Fj7JRfp42umapDbzzeYBM7xspEaCtRXmWZKjV2B",{"commitment":"confirmed"}],"result_hash":"c8dfce075ba179368b5edd024704d0c0f387ea5442ecc92dd5ed20778e1a3180","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["CkW2UPy1mPJuDxXHTjjBru16V468p489DoVhjwh2LP4C",{"commitment":"confirmed"}],"result_hash":"d8116551ec32041c2b742882dd5641adfc643ba664bf36be9621630ce3b14768","slot":null},{"block":null,"method":"getMultipleAccounts","params":[["XsAsZLF4MmsvS1sDxRMrUz7REjHfwbC9UAMXSRBqgEB","EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"9c32a811f5b034062459c8f53c7768eb761012a30b04a9211237ea4d74502f60","slot":null},{"block":null,"method":"getTokenSupply","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed"}],"result_hash":"b69903a6c50e6dd1a2304be8ea716af3afa346ce693f89e6f87702934b1608d0","slot":null},{"block":null,"method":"getAccountInfo","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451802510},"value":{"data":["AQAAAJj+huiNm+Lqi8HMpIeLKYjCQPUrhCS/tA7Rot3LXhmbTk3mr2H0GwAGAQEAAABicKqKWcWUBbRShshncubNEm6bil06OFNtN/e0FOi2Zw==","base64"],"executable":false,"lamports":534808027998,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"2a605e4df49672fb420380900647c4d255ae518395db459462c00f1165798060","slot":null},{"block":null,"method":"getTokenSupply","params":["XsAsZLF4MmsvS1sDxRMrUz7REjHfwbC9UAMXSRBqgEB",{"commitment":"confirmed"}],"result_hash":"3aee051119a7ca99918b2abae4f7b4a57b006fc6a551a1719552a619484b79e9","slot":null},{"block":null,"method":"getAccountInfo","params":["XsAsZLF4MmsvS1sDxRMrUz7REjHfwbC9UAMXSRBqgEB",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451802530},"value":{"data":["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","base64"],"executable":false,"lamports":5602800,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":677}},"result_hash":"fa5f59096a6659e0fa183335fca8154145215ec07c8f9177cb99bf7dd97628e8","slot":null}],"registry_entry":{"chain":"Solana","contract":"XsAsZLF4MmsvS1sDxRMrUz7REjHfwbC9UAMXSRBqgEB","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-09-29T23:37:23Z","name":"Uber","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"UBER"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":451802499,"subject":"Grbgeue4XL4M5tcw6vJ7YZv7CtbwaqLDGgpCAAt35M3q","ticker":"UBER","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"UBER"}},"version":1}

Signature

0bt+HEPabkwsQxRao7X8Gz5mtgGHyl54u9nJJNqRqtGNb3EwaoScrv5oAYGAxSzDDYzb6UWim8fOFXP/hTuaCw==

API call

GET /api/attest/7680b211398437c47cafcea01b976f49179971ace6a46e34eed5a149c0f353b0

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.