Provenance Record

Well-structured News piece (728 words, within the 400-1200 range for the category). Clear Overview / What We Know / What We Don't Know sections. Neutral, factual tone throughout with no editorializing or sensationalism.

Read all 4 source snapshots in full from sources/2026-08/antora-energy-closes-550-million-series-c-to-scale-carbon-block-thermal-battery-manufacturing/ (source-0.html.gz = Energy-Storage.News, source-1.html.gz = Canary Media, source-2.html.gz = ESG Today, source-3.html.gz = Crunchbase News). All returned HTTP 200 with no suspicious_patterns flagged in the manifest. Every claim in the article body traces to the source it cites: the $550M Series C figure, co-leads (G2 Venture Partners, Eclipse), full new/existing investor lists, Decarbonization Partners as a BlackRock/Temasek JV, John Doerr's Kleiner Perkins affiliation (source says 'chairman of Kleiner Perkins', article says 'affiliated with' — accurate paraphrase), undisclosed valuation, San Jose HQ and 2017 founding (ESG Today: 'Founded in 2017, California-based Antora Energy'), $770M raised since 2017 and $150M Series B in Feb 2024 (Crunchbase), carbon blocks up to 2,400°C and TPV technology (Energy-Storage.News), the 'enormous toaster' description (Canary Media, quoted correctly with attribution), Big Stone 5GWh South Dakota system built in under 12 months and the POET Bioprocessing offtake (Energy-Storage.News), the Big Stone City / wind-to-steam / coal-displacement / 'one of the largest battery storage projects' details and 200+ battery modules (Canary Media), the three-building San Jose campus and its ranking among the country's largest battery factories, the second-manufacturing-hub plan, the undisclosed hyperscaler pipeline, the 2023 Wellhead Electric pilot near Fresno (Canary Media), both direct quotes from Andrew Ponec and Jake Tauscher (verbatim in both Canary Media and ESG Today), and the $15B H1 2026 cleantech investment figure with the 2025/2021/2022 comparison (Crunchbase). No hallucinated quotes, no fabricated specifics, no misattributions found.

All claims, figures, names, and direct quotes verified verbatim against source snapshots. No unsourced statistics or facts found.

High-quality, well-sourced submission ready for publication as-is. No corrections needed.