Fix stated block range: 960111, not 960095

310 Bitcoin attestations across 85 sealed documents, all merkle roots verified

Add Bitcoin anchors table: 310 attestations, all merkle roots verified

Mark 12 rows unattested

Document the unattested window: sealing dropped the method flag

144 rows, 56 resolved, add method column

Update to 2026-07-29 snapshot: 144 rows, 56 resolved, method column

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