AMDx/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":"2026-09-29T04:22:19Z","dev":false,"expires_at":"2026-09-30T04:22:19Z","issuer":"Backed xStocks","pool":{"base":{"address":"XsXcJ6GZ9kVnjqGsjBnktRcuwMBmvKWh8S93RefZ1rF","balance":"516409926","decimals":8,"symbol":"AMDx"},"chain":"Solana","dex":"meteora-dlmm","pool":"5JjaEZfYzxQn3DAbAjDi8expi4b4aVnFTYDuonx15w5N","quote":{"address":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","balance":"9439440474","decimals":6,"symbol":null}},"quote_share_of_supply":0.00007224453921248489,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"8a8958f93b7413c26bd866eed26a52a315413317a676d127942b0c7441bfd644","slot":451532547},{"block":null,"method":"getAccountInfo","params":["5JjaEZfYzxQn3DAbAjDi8expi4b4aVnFTYDuonx15w5N",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451532548},"value":{"data":["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","base64"],"executable":false,"lamports":7183720,"owner":"LBUZKhRxPF3XUpBCjp4YzTKgLccjZhTSDM9YuVaPwxo","rentEpoch":18446744073709551615,"space":904}},"result_hash":"cf003dc7a411c4b552cb53839b58e64c87f7a1311b03b5b40224f21f2cc0c24d","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["7QZRXx8NEkKmKJLAoPUgvD5LjcMWrqfodEVVNT9fvL4x",{"commitment":"confirmed"}],"result_hash":"0c3716ab6007ef95425021602156b2a591f06d8f9daea9562b7f9a777ec1ee3d","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["7VdTW7imMaC3kJik4RpuMgvbW9jsXXFrZQ7AtQpaEXr2",{"commitment":"confirmed"}],"result_hash":"78b0fc23f10d04158faa69b81d5f99193c839427546404b948c48c81800c8acd","slot":null},{"block":null,"method":"getMultipleAccounts","params":[["XsXcJ6GZ9kVnjqGsjBnktRcuwMBmvKWh8S93RefZ1rF","EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"7bce1d44052cb16f82e31d8c5ea574377f736726fa4e03ba37286944cbe77b8d","slot":null},{"block":null,"method":"getTokenSupply","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed"}],"result_hash":"1ee2b42a3e6e87bf3c488e83db66217b99c87c5017c3bad3f7b9c1d197a25758","slot":null},{"block":null,"method":"getAccountInfo","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451532559},"value":{"data":["AQAAAJj+huiNm+Lqi8HMpIeLKYjCQPUrhCS/tA7Rot3LXhmb0g8HFPrnHAAGAQEAAABicKqKWcWUBbRShshncubNEm6bil06OFNtN/e0FOi2Zw==","base64"],"executable":false,"lamports":534808027998,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"7649471917a63e29bd245168e03af8a71b94b2ad1e53292acc46629a84f56869","slot":null},{"block":null,"method":"getTokenSupply","params":["XsXcJ6GZ9kVnjqGsjBnktRcuwMBmvKWh8S93RefZ1rF",{"commitment":"confirmed"}],"result_hash":"a7e12067a3034bc42356025b8b8eefef0c3b8a771d9817de7088048ea5836379","slot":null},{"block":null,"method":"getAccountInfo","params":["XsXcJ6GZ9kVnjqGsjBnktRcuwMBmvKWh8S93RefZ1rF",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451532577},"value":{"data":["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","base64"],"executable":false,"lamports":5581920,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":674}},"result_hash":"a10e524ae20ae5800ef3f51eacd598906c7bcbd9255a795136f82feeeddb3510","slot":null}],"registry_entry":{"chain":"Solana","contract":"XsXcJ6GZ9kVnjqGsjBnktRcuwMBmvKWh8S93RefZ1rF","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-09-29T04:07:50Z","name":"AMD","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"AMD"},"registry_hash":"bb58b47c7c8dae3da268f60868447e5a60399e422951f04e8b052526e12a0244","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":451532547,"subject":"5JjaEZfYzxQn3DAbAjDi8expi4b4aVnFTYDuonx15w5N","ticker":"AMD","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"AMD"}},"version":1}

Signature

+tU6II8VY6hvyDX9gvLzQC//MKYpYCqa6mYWmy7wk+LQghXdiUzUvi5fzqPmPfqzG13qV3uiCWCftIFP7+puDA==

API call

GET /api/attest/7a75273e4e93baa8cbf6c1bf66638f835d5bfa92edc6091110caa5c12518198e

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.