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Key Capabilities Browser WebCrypto Verification: Validates RFC 4034, RFC 4035, and RFC 5155 chains from IANA Root KSK trust anchors using SubtleCrypto. Multi-Resolver DoH Comparison: Query Cloudflare 1.1.1.1, Google 8.8.8.8, Quad9 9.9.9.9, DNS.SB, DNS4EU, or custom DoH resolvers with side-by-side CD=1 / CD=0 and RFC 8914 Extended DNS Error (EDE) inspection. Interactive Graph & Snapshot Diffing: Inspect cross-zone CNAMEs, missing SEP keys, time-travel RRSIG expiration windows, and export standalone SVG or PNG diagrams.