{"attestation_date":"2026-10-08","merkle_root":"1d5ba74980d90179a2f353410b5f4714779f2ba1569519f80defeb78279df471","total_sources":46455,"max_source_id":80998,"signature":"1153d68c3638f1ec41b2a364fc0a6deb00fd0fc8d62d3c76ac8798805fa4d6c1","signature_algorithm":"hmac-sha256(date|root|total_sources)","external_publish_url":null,"computed_at":"2026-10-08T02:01:36.152Z","witnesses":[],"verifyHowto":{"summary":"Rebuild the Merkle tree from /source/:id/receipt.json hashes for id in [1..max_source_id] and compare to merkle_root.","leafOrder":"ascending by source.id, content_hash strings as-is (lowercase hex)","hashFunction":"sha256","interiorNodeFormula":"sha256(left_hex || right_hex)","oddLevelHandling":"duplicate the last leaf (Bitcoin convention)"}}