ScopeLatch Bitcoin-attested OpenTimestamps proof envelope Artifact: site-index-2026-07-18.sha256.txt Artifact SHA-256: 77f142665c452c02cb73990aa9182e056ac584d38911c14c5feee4e58fba6efc Upgraded OTS proof SHA-256: a32dd1ce5fb49981634a1895b748fd3c17072228a63dbcc7f780f1e795b13196 Status: BITCOIN BLOCK ATTESTATIONS PRESENT AND INDEPENDENTLY CROSS-CHECKED Upgraded: 2026-07-20 UTC The upgraded binary proof contains three BitcoinBlockHeaderAttestation paths: - height 958552; block 000000000000000000018a388d34083fc46ec0761c49cb8e96e24268bc33d538; time 2026-07-18T13:15:29Z; merkle root 9619386e65044c81dfe0b2d6a453f9bbef02e9fad091f765425813c160e21baf; anchor tx 53cfae663e43daab0afdb1a0fad8fa1c2c75968a234c5a200000fc0c054b9330. - height 958554; block 00000000000000000001ab281df1171c8166cb7c7e8175ac0dade68e6bcc746b; time 2026-07-18T13:17:01Z; merkle root 74e6cab78cb7f79749772889d4cc6101df0227c6ba9c8f107989f9ed87b01932; anchor tx 8ce88921158deeffc3028148f0fa119e8f7930a8a8dc5acc10021c1a3c693c83. - height 958601; block 00000000000000000001bc65cb5a4cdaf350574f0f454dd61e9b86d40f715379; time 2026-07-18T19:27:02Z; merkle root f1aa572c853c9ee283b587a4e85eb72dbf297dcbbc22474b3f24987ef5da20fd; anchor tx 0298b3a47f796ecb13fce7488a6d874a81d65aaa0fae9f964de0b3e883720cb7. The block hashes, heights, timestamps, merkle roots, and confirmed transaction inclusion were independently fetched from mempool.space and matched the upgraded proof's ots info. Local ots verify could not consult a local Bitcoin Core node because none is configured; this limitation is explicit rather than hidden. To reconstruct the upgraded binary proof: tail -n 1 site-index-2026-07-18.bitcoin-ots.txt | base64 -d > site-index-2026-07-18.sha256.txt.ots Then verify with opentimestamps-client and a trusted Bitcoin node against the exact artifact. Base64 upgraded proof (single final line): 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