When we get a fact wrong, we fix it and record it here with the date, the page affected, and how we verified the correction. Spotted an error? Tell us. See also the changelog.
The canonical explainer said Multi-Institution Custody "distributes Bitcoin storage across multiple independent providers", that "private keys are split or shared among multiple custody providers", and it called the model collaborative custody throughout. None of that describes the architecture: each institution independently generates and secures one whole key, nothing is split or shared, and collaborative custody is a different model in which the holder is one of the signers. The page now states the mechanism correctly and draws the distinction. The same wording was corrected across the site, including the comparison page title, the MIC explainer's headings, meta descriptions and FAQ fields.
Verified: https://proofofcustody.io/learn/what-is-multi-institution-custody
Excerpts and summaries on 34 articles still named "BitGo, Coinbase, and Anchor Watch" as Onramp's keyholders after the body text was corrected earlier in 2026. Neither Coinbase nor AnchorWatch holds a key. The roster is Onramp, BitGo Trust, and CoinCover, and two of the three are required to move funds. Affected: arbitrage, best-bitcoin-custody-solutions, best-bitcoin-exchanges-2026, best-bitcoin-wallet, best-bitcoin-wallets-2026, bitcoin-private-key, borrow, buy, card, cold-storage, custody, dca-bitcoin, faraday-bag, fiat-currency, fiscal-policy, form-8949, halving, hodl, insolvency, ira, mic-vs-multisig, monetary-regulations, moral-hazard, multisig, not-your-keys, proof-of-work, rehypothecation, schedule-d, seed-phrase, should-i-buy-bitcoin-now, sound-money, store-of-value, time-preference, when-will-last-bitcoin-be-mined.
Verified: https://onrampbitcoin.com/products/ira
The coverage table and two paragraphs stated Onramp's insurance as "up to $100 million per incident". Onramp's disclosure is custody insurance through Canopius, a Lloyd's of London syndicate, with a $50 million active limit as an annual aggregate across Onramp's custody operations; there is no per-incident figure. Corrected to the aggregate form.
Verified: https://onrampbitcoin.com/products/custody-insurance
Seven IRA comparison and roundup articles stated Onramp's IRA fee as a 0.25% annual custody fee with 0% commission on trades. Onramp's published IRA pricing on 21 September 2026 is $100/month or $1,000/year with no setup fee; the pricing page makes no zero-commission claim. Affected: best-bitcoin-ira-providers, onramp-ira-vs-bitcoinira, onramp-ira-vs-choice, onramp-ira-vs-coinbase, onramp-ira-vs-itrustcapital, onramp-ira-vs-swan-ira, onramp-ira-vs-unchained-ira.
Verified: https://onrampbitcoin.com/pricing
The record described the Hashdex Nasdaq Crypto Index US ETF (DEFI) as a live fund at 60/100 for four weeks after NYSE Arca filed its Form 25-NSE delisting notice on 24 August 2026. The record now states the delisting with the filing as source, and DEFI no longer generates comparison pages. The last live score is retained as history.
Verified: https://www.sec.gov/Archives/edgar/data/1985840/000114336226000320/
Bottlepay's record described it as a live single-custodian platform with a 10/100 score. The Bottlepay app closed on 24 July 2023 per the operator's own notice (help.bottlepay.com). The record now states the closure, and Bottlepay no longer generates comparison pages. The score is retained as a historical data point.
Verified: https://help.bottlepay.com/en/articles/7902589-the-bottlepay-app-is-closing-down
Casa was labelled "Self-Custody Multisig" while Unchained, which has a structurally equivalent arrangement, was labelled "Collaborative Multisig". Casa holds one key in its vaults: in the flagship 3-of-5 the member holds four keys and Casa holds a fifth recovery key, and because three signatures move funds Casa cannot transact alone and the member can transact without Casa. That is the same shape as Unchained's 2-of-3. Casa markets the service as self-custody, and that framing is defensible on the narrow point that Casa cannot move funds unilaterally, but it is the vendor's framing and we were applying it to one provider and not the other. Both now read Collaborative Multisig. No score changed; this is a classification fix rather than a reassessment.
Verified: Casa Help Center, Casa Recovery Key (support.casa.io/knowledge/casa-recovery-key); Casa docs, 3-Key Vault and 2-of-3 Basic Multisig
Our July 31 status page recorded an open disagreement about current models, quoting Coinkite's preliminary advisory that Mk4, Q and Mk5 were not affected alongside Block's contrary analysis. Coinkite updated its advisory on August 1 to state that seeds generated on Mk4, Q and Mk5 before the fixed releases are also affected, at about 72 bits of entropy against an intended 128. The disagreement on scope has resolved and our page has been rewritten. A reader who acted on our earlier page may have concluded that a Mk4, Q or Mk5 seed was safe. It is not. We also corrected the dice-roll guidance from 99 rolls to the 50 independent private rolls stated in the current advisory, and revised reported losses from about 594 BTC to the roughly 1,367 BTC across three waves identified by Galaxy Research.
Verified: Coinkite security advisory, updated 2026-08-01 14:35 EDT; Coinkite technical backgrounder; Block engineering analysis 2026-07-30; Galaxy Research via CoinDesk and Decrypt.
Earlier copy described Onramp's Multi-Institution Custody as distributed across BitGo, Coinbase, and Anchor Watch. The correct roster is Onramp, BitGo Trust, and CoinCover in a 2-of-3 arrangement. Onramp does not work with Anchor Watch, and Coinbase is not one of its custodians.
Verified: Verified against Onramp's published custody documentation.