LINx/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":"2026-09-29T23:09:48Z","dev":false,"expires_at":"2026-09-30T23:09:48Z","issuer":"Backed xStocks","pool":{"base":{"address":"XsSr8anD1hkvNMu8XQiVcmiaTP7XGvYu7Q58LdmtE8Z","balance":"66205413","decimals":8,"symbol":"LINx"},"chain":"Solana","dex":"raydium-clmm","pool":"75eRvwactaaKakunTgHxyj7NV2PcJL47CTCzWq4yAFnH","quote":{"address":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","balance":"858554723","decimals":6,"symbol":null}},"quote_share_of_supply":0.000019293432333836096,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"6338ce711f2fe63de6bdec3f1f7e3378ba0faf9d14fd30f6283b66cbbe27c97b","slot":451785227},{"block":null,"method":"getAccountInfo","params":["75eRvwactaaKakunTgHxyj7NV2PcJL47CTCzWq4yAFnH",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451785227},"value":{"data":["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","base64"],"executable":false,"lamports":11637125,"owner":"CAMMCzo5YL8w4VFF8KVHrK22GGUsp5VTaW7grrKgrWqK","rentEpoch":18446744073709551615,"space":1544}},"result_hash":"0ea5de3808df871613237dace06900fe700a9e82f77e5c2819d81a69bac9851a","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["JBr9vdKNfscXxdLfyaQmNAa1LgD2hri1Bszj1gZX3ZLY",{"commitment":"confirmed"}],"result_hash":"95a8bd838f6d6b20306e4cc1939687e2d71152c5547c55a07e9455e1bd73369c","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["GB3oRvicwUPhjGiwdWWhrgvXuD652YPeid8SSJmZ9KtN",{"commitment":"confirmed"}],"result_hash":"5699a3b1442dbc5470981823da556cb4d52197041e971634d1080e370c71905a","slot":null},{"block":null,"method":"getMultipleAccounts","params":[["XsSr8anD1hkvNMu8XQiVcmiaTP7XGvYu7Q58LdmtE8Z","EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"3c7c380456794a07143120edd81729f6e429034a8da4a7403267ba268e7a57b7","slot":null},{"block":null,"method":"getTokenSupply","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed"}],"result_hash":"2c4d7ace75f13080aa09bc614c439c62ddca4b7f9934b6efd581da1cb833426b","slot":null},{"block":null,"method":"getAccountInfo","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451785233},"value":{"data":["AQAAAJj+huiNm+Lqi8HMpIeLKYjCQPUrhCS/tA7Rot3LXhmbybO8N6YqHAAGAQEAAABicKqKWcWUBbRShshncubNEm6bil06OFNtN/e0FOi2Zw==","base64"],"executable":false,"lamports":534808027998,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"e6d30da2eae882a43da48e806930cbbc1b0a615c21ce5515b52551d302c63234","slot":null},{"block":null,"method":"getTokenSupply","params":["XsSr8anD1hkvNMu8XQiVcmiaTP7XGvYu7Q58LdmtE8Z",{"commitment":"confirmed"}],"result_hash":"654b5bb3f63a4ce33b8dc5ce163fc32bfb97c8ceaf3de72cc2f08e3a8a2599a9","slot":null},{"block":null,"method":"getAccountInfo","params":["XsSr8anD1hkvNMu8XQiVcmiaTP7XGvYu7Q58LdmtE8Z",{"commitment":"confirmed","enc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xStocks","last_checked":"2026-09-29T22:37:23Z","name":"Linde","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"LIN"},"registry_hash":"d6272adf0af69a1c2c18f6a79db79616f69be8189283a420b5ba6e572aa0e4ad","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":451785227,"subject":"75eRvwactaaKakunTgHxyj7NV2PcJL47CTCzWq4yAFnH","ticker":"LIN","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"LIN"}},"version":1}

Signature

tsLWc83ESjDoSi4FlE17Ny9FtI+1Hz9bmoT8VB7KiSehjylUdfRjyjNFYDbtRK8sZUz8v3hqeVzCfdeyivJyAw==

API call

GET /api/attest/3025fc610ec89eca3bd483f66d163c01e5fa4a4c58c2b84a6bc8f4414b1283a1

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.