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AssayDesk’s described approach is to keep ESMA’s published MiCA register values intact, show any display corrections separately, and record differences between published files. That distinction matters: a changed or missing row is evidence of a change in the data feed, not proof by itself that a firm’s legal status changed.
What the ESMA MiCA register contains
The European Securities and Markets Authority (ESMA) publishes its interim MiCA register as five CSV file categories, not as a single count of firms or records:
- Crypto-asset white papers other than those for asset-referenced tokens (ARTs) and e-money tokens (EMTs)
- ART issuers
- EMT issuers
- Authorised crypto-asset service providers (CASPs)
- Entities reported as non-compliant providers of crypto-asset services
ESMA says it republishes the latest files weekly. Its page displayed a last-update date of 7 October 2026 when checked. ESMA also cautions that information reported to competent authorities or listed in national registers may not appear immediately in the central files. The weekly schedule is ESMA’s publication cadence; the daily retrieval described for AssayDesk is a separate product-process claim. ESMA’s interim MiCA register page
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In his description of AssayDesk, Julio Molina Soler says the tool fetches the five files daily, archives each fetched file with a SHA-256 hash, and preserves the values from ESMA in its register tables. That includes imperfect source data such as truncated names, malformed dates, duplicated URLs, or blank fields.
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The described curation process does not overwrite those values. Instead, deterministic rules create separate display-ready annotations—for example, a normalized date, trimmed name, or repaired link—alongside the source value. The article says the rules are versioned and that each correction identifies the rule that produced it. This is the author’s account of the product; it has not been independently verified against the live tool.
Why keeping both values matters
Keeping the original and the annotation distinct lets a reader see what ESMA published and what AssayDesk changed for display. A normalized value may be easier to use, but it should not be mistaken for the regulator’s original entry. When an exact source value matters, consult the archived file or ESMA’s published CSV rather than relying only on a cleaned display.
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How the described review and model observations work
The article says a weekly model review can add observations about records that appear suspicious, but does not write or alter register values. It also says model-generated observations are labelled unverified until a human confirms them. These are product-process claims reported by the author, not independently audited safeguards.
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What AssayDesk’s change history can and cannot assert
According to the article, AssayDesk’s history records differences its sync observes between two published files: a record appearing, a field changing, a withdrawal date being published, or a record disappearing. That history can help identify when the published data changed. It does not, by itself, establish why the change occurred or prove a legal event.
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A missing row is not a legal conclusion
A record’s disappearance from a CSV does not alone prove that an authorisation was withdrawn, nor does absence from ESMA’s central register alone prove that an entity is unauthorised. ESMA’s files reflect information received from the relevant authorising or notifying competent authority, and updates may not appear immediately. For a firm’s current status, check the relevant national competent authority and the official register.
How MiCA Article 109 fits
MiCA Article 109 sets out the register’s categories and information requirements, including CASP identity and contact details, the authorising authority, services, host Member States, start date, and authorisation or withdrawal date. It also addresses competent-authority notifications of certain measures. Specified authorisation withdrawals and measures are retained in the register for five years. ESMA says a withdrawn authorisation record remains with its effective withdrawal date. These legal and register provisions explain why a file difference should not be translated into a status claim without checking the authoritative record. MiCA, Regulation (EU) 2023/1114, Article 109
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What the register does not certify
ESMA says the crypto-asset white papers in its register have not been reviewed or approved by a competent authority in an EU Member State. Their presence is not an endorsement of the project or verification of the paper’s contents; ESMA says the offeror or issuer is solely responsible for that content. ESMA’s interim MiCA register page
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How to use a register tracker responsibly
When assessing AssayDesk or another tracker, check how it handles the parts that determine whether its output is auditable:
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- Source visibility: Can you inspect the exact raw value published by ESMA?
- Separate corrections: Are display changes identified and explained instead of silently replacing the source?
- Rule history: Can you tell which versioned rule produced a correction?
- Snapshot provenance: Are dated source files retained so a reported change can be traced to specific publications?
- Careful event language: Does the history describe a file-level difference without presenting it as a legal status change?
- Publication timing: Does the tracker distinguish its own retrieval schedule from ESMA’s weekly publication interval?
- Human review of model notes: Are automated observations clearly labelled and subject to confirmation?
The article describes AssayDesk’s practices on these points, but the live overview and data-quality pages were not independently checked. Treat those details as the author’s description rather than as a verified product audit.
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