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WFN QUICK BRIEF · UNDER 1 MIN
The short version
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What the primary record establishes
ERC-4906, created on 13 March 2022 and marked Final, adds MetadataUpdate and BatchMetadataUpdate events to ERC-721. The extension is optional and notifies third-party platforms when token JSON metadata changes. Ethereum EIPs — ERC-4906: EIP-721 Metadata Update Extension, Final ↗
What the distinction changes
For an NFT display, a metadata event is a reason to fetch updated descriptive information. It does not itself show that the owner changed, that a sale occurred or that a royalty was paid.
What to check before drawing a conclusion
WFN would retain the contract address, token identifier, event block and metadata content used by the interface. When comparing two displays, check whether they fetched the same version before treating a visual difference as a blockchain discrepancy.
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WFN STORY COMPASS
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Original WFN vector illustrationWFN · 23 October 2026
Editorial noteSource-based explanation with original WFN analysis. Historical records retain their dates; numerical examples are illustrative. The original vector illustration is conceptual and is not documentary evidence.
WFN REALITY LEDGER
What is on the record?
Primary-source explainer
Primary-source explainer
Primary record / reference periodERC-4906, created 13 March 2022; Final status checked 23 October 2026
The linked source supports the documented record; WFN interpretation and illustrative examples are separate.
The optional ERC-721 extension standardises notifications about changed metadata. A refreshed image and a change of token owner are separate events.
01 · VERIFIED RECORD
What the primary record establishes
ERC-4906, created on 13 March 2022 and marked Final, adds MetadataUpdate and BatchMetadataUpdate events to ERC-721. The extension is optional and notifies third-party platforms when token JSON metadata changes. Ethereum EIPs — ERC-4906: EIP-721 Metadata Update Extension, Final ↗
The specification recommends not emitting the update event merely because tokenURI changes when the JSON metadata stays the same. It also defines interface identification through supportsInterface with 0x49064906. Ethereum EIPs — ERC-4906: EIP-721 Metadata Update Extension, Final ↗
02 · WFN EDITORIAL ANALYSIS
What the distinction changes
For an NFT display, a metadata event is a reason to fetch updated descriptive information. It does not itself show that the owner changed, that a sale occurred or that a royalty was paid.
A stale marketplace image can therefore be an indexing problem rather than evidence of a failed transfer. Conversely, a newly displayed image does not prove a recent ownership transaction. The application needs the appropriate records for each claim.
03 · REVIEW POINTS
What to check before drawing a conclusion
WFN would retain the contract address, token identifier, event block and metadata content used by the interface. When comparing two displays, check whether they fetched the same version before treating a visual difference as a blockchain discrepancy.
Support for the extension is one compatibility fact. It is not a promise that metadata is immutable, that every platform refreshes immediately or that the asset has a particular market value. Those conclusions require different evidence.
