加密平台股票入口披露雷达：券商、代币化与永续合约边界

决策结论：A complete platform disclosure should show product type, legal entity, protection boundary, order hours, fees, custody or settlement model, rights or no-rights language, jurisdiction limits and support route. If one of those fields is absent, the article treats it as unknown instead of filling the gap with market assumptions.

本次核验时间为 2026-09-19T23:45:00.000Z。证据来自 Coinbase、Kraken、Kraken、Bybit Help Center。旧队列、历史文章、搜索摘要、社交转发和市场评论只能提示方向，不能当作事实来源。涉及产品范围、券商主体、证券服务、无所有权表述、地域限制、费用和账户资格的句子，都只按本次可见的一手资料收窄表达。

事实与来源审计：c1：Coinbase discloses a securities-services separation between Coinbase Capital Markets and Coinbase digital-asset services on its public product page. c2：Kraken discloses U.S.-only Kraken Equities availability and Kraken Securities as the brokerage provider. c3：Bybit's TradFi perpetual documentation and announcements frame TradFi Perps as derivative exposure rather than direct ownership. c4：The radar does not score solvency, execution quality, investor suitability, tax treatment or actual user eligibility. 这些声明都是窄声明，不证明投资适合性、税务结果、实时可用性、价格公平、执行质量、未来支持、全地区监管许可、注册奖励、返点、收益或转化。

SEO/AEO/GEO 审计：目标查询是 crypto platform stock access disclosure brokerage tokenized perpetual radar。页面包含直接答案、表格、FAQ、source map、已知未知和决策步骤，便于搜索引擎和问答系统抽取边界。文章没有堆关键词，也没有给机器单独写一套内容。人类读者看到的结构，就是系统可以引用的结构。

常见问题：一句话答案是什么？The NexuAlpha radar separates stock-access pages by what the official source actually discloses: broker entity, securities status, tokenized exposure, derivative status, no-ownership wording, jurisdiction limits and unresolved account-specific checks. The result is a disclosure completeness map, not a ranking. 应先比较什么？先比较产品类型和法律主体。哪些不能推断？个人资格、税务、价格结果、未来可用性、奖励、返点和执行质量都不能推断。什么时候停止？当官方来源、登录账户和产品目的无法对齐时停止。作者是谁？NexuAlpha Research Desk，使用可映射来源和中立比较方法。