I need to pull primary OI data from Deribit, Coinglass, or Volmex before writing anything. Let me search for the actual figures.No primary data for the specific May 29, 2026 expiry or the Deribit-vs-IBIT OI comparison from these results. Let me go directly to Deribit's stats page and Coinglass for live OI data.Deribit's stats page is a JS app — it won't render via fetch. Let me try their public API and a CoinDesk primary source for the May 29 expiry story.I found some key data points. The Bloomberg snippet confirms: IBIT topped Deribit at ~$38B vs $32B on Sept 29, 2025. The Block has a headline "Deribit tops $40B in Bitcoin options open interest amid $15B quarterly expiry." Let me fetch that Block article and the CoinDesk primary source for today's story.I'm finding useful context but not the specific May 21, 2026 primary sourcing for Deribit reclaiming the OI lead from IBIT. The CryptoSlate snippet mentions total BTC options OI near $55.76B with Deribit at $46.24B. Let me fetch that article and also search specifically for today's CoinDesk story that the brief references.This is critical. I now have a conflict in the sourcing: the KuCoin article says IBIT OI first surpassed Deribit on April 25, 2026 (at $27.61B vs $26.90B), not in September 2025 as Bloomberg reported. The Bloomberg article from Sept 29, 2025 shows IBIT at ~$38B vs Deribit at $32B — but that was during a different period. Let me fetch the KuCoin article and the CoinDesk May 22, 2025 (actually 2025) article to clarify the timeline, and search for today's specific story.Now I have the key sourcing problem clearly: there is no primary source confirming that Deribit has reclaimed the OI lead from IBIT as of May 21, 2026. What the data actually shows is the opposite: IBIT overtook Deribit on April 25, 2026 (per Volmex data, cited in the KuCoin article), and as of January 2026 IBIT was at $33B with 52% market share. The brief's premise — Deribit reclaiming the top spot on May 21, 2026 — cannot be verified from any primary source I can access.

The CoinDesk story I found ($42.5B on Deribit) is dated May 21, 2025 — one year earlier — not 2026.

This is exactly the editorial feedback situation: the previous attempt filed a story with unverifiable core claims. My editorial obligation is clear — I cannot file a story whose headline assertion ("Deribit Reclaims Bitcoin Options Crown") cannot be confirmed from any primary source. What I can do is report on the verified $6.25B May 29 expiry mechanics and the Deribit/IBIT structural backdrop, while flagging what isn't confirmed.

Let me search for the May 29 expiry primary source specifically.No primary source confirms the $6.25B May 29, 2026 expiry or the $82K call wall. I also cannot find any source confirming Deribit has reclaimed the OI lead from IBIT as of May 21, 2026. What I have established from primary sources:

Confirmed facts:

  • IBIT first exceeded Deribit in OI in late Sept 2025 (~$38B vs $32B per Bloomberg)
  • IBIT again edged past Deribit on April 25, 2026 at $27.61B vs $26.90B per Volmex (KuCoin article citing Volmex)
  • Deribit hit record $42.5B OI on May 21, 2025 (not 2026) per CoinDesk/CEO Luuk Strijers
  • Bitcoin price has been around $105K-$111K range in May 2026

The brief's core premise — Deribit reclaiming OI leadership on May 21, 2026 — is not confirmed by any primary source I can find. The $6.25B May 29 expiry figure and $82K call wall are also unverified from primary exchange data. This is exactly what the editorial feedback flagged.

My obligation as Diego Salas is to report what is verifiable and flag what isn't — not to file a story whose headline is an unconfirmed assertion. I need to either find the primary sourcing or decline to write the piece as framed. Let me make one more targeted search for the specific CoinDesk story the brief says exists.The CoinDesk tag page for "IBIT options open interest topped Deribit on Friday" — that snippet matches an April story by Omkar Godbole. Let me fetch the CoinDesk options tag to find the specific May 21, 2026 story.The tag page renders too little. I have now exhausted my primary sourcing attempts. Here is the situation clearly:

What I can confirm from primary/authoritative sources:

  • IBIT first exceeded Deribit's Bitcoin options OI on Sept 29, 2025 (~$38B vs ~$32B, Bloomberg)
  • IBIT again edged ahead on April 25, 2026 ($27.61B vs $26.90B, Volmex data via KuCoin)
  • Deribit hit $42.5B OI record on May 21, 2025, not 2026 (CoinDesk/CEO Luuk Strijers)
  • The most recent confirmed figure for the Deribit vs IBIT comparison shows IBIT still ahead as of late April 2026

What I cannot confirm from any primary source:

  • That Deribit has reclaimed the OI lead from IBIT as of May 21, 2026
  • The $6.25B May 29, 2026 expiry figure
  • The $82K call wall and $75K max pain levels for May 29

The brief states CoinDesk flagged this as a top story on May 21, 2026, but I cannot locate that story. The core event the headline asserts is not verifiable from any source I can reach. Filing this story would mean publishing an unconfirmed headline — exactly what editorial feedback round 1 flagged.

Per my SOUL.md and AGENTS.md: "A brief that asks for a figure no primary source can confirm: say so, report what is verifiable, flag what is not." I cannot fabricate this piece. I must escalate.

SOURCING BLOCK — cannot file as briefed

After exhaustive primary-source checking, I cannot verify the core claim in this brief and cannot file the story as written. Here is the exact sourcing gap:

The headline assertion — Deribit reclaimed the Bitcoin options OI lead from IBIT on May 21, 2026 — is not confirmed by any primary source I can reach.

What the primary sources actually show:

  • Sept 29, 2025: IBIT first topped Deribit, ~$38B vs ~$32B (Bloomberg primary source, confirmed).
  • April 25, 2026: IBIT again nudged ahead of Deribit, $27.61B vs $26.90B per Volmex data (KuCoin article citing Volmex as data source — the most recent confirmed Deribit vs IBIT comparison I can find).
  • May 21, 2025 (one year prior): Deribit hit a record $42.5B OI as BTC hit $111K — the CEO confirmed this to CoinDesk. This is a different date from the story's event.
  • The brief cites "CoinDesk flagged this as a top story on May 21, 2026" — I cannot locate that article. Searching CoinDesk's options tag and live search returns no such story.
  • The $6.25B May 29 expiry figure, the $82K call wall, and the $75K max pain level have no primary source confirmation in any search result I can access (Deribit, Volmex, Coinglass).

What this means: The story cannot be filed as headlined without fabricating or asserting as fact something I cannot trace to a primary source. Deribit's UI is a JS app that won't render via fetch. Coinglass returns no usable data. The Deribit API returns individual contract book summaries, not aggregated OI by venue for comparison.

What I recommend: If the Head of Editorial has access to a live Volmex dashboard, Coinglass table, or a Deribit official announcement confirming the OI reversal on May 21, 2026 — send me the specific URL or the raw data values and I will file the story immediately. Alternatively, if the brief's sourcing is the CoinDesk live markets item, a direct link to that article would unblock this.

Until then, filing this piece would mean publishing an unverified headline — which is a retraction risk, not a story.