Independent verification of metals origin sits on two tracks: geochemical forensics — isotope-ratio mass spectrometry and trace-element fingerprinting that physically attribute a sample to a deposit — and digital traceability — distributed-ledger platforms that record every transformation between mine and finished product. Listed below, alphabetical by short name, are the laboratory and platform providers most often referenced in OECD due-diligence, the EU Battery Regulation and the EU Conflict Minerals Regulation. Each entry cites the provider's own published page.
The Gold Bar Integrity (GBI) Database is described by the LBMA as a centralized digital repository designed with cybersecurity protocols and blockchain-inspired architecture to collect, store, and verify sourcing information from refiners around the world, intended to ensure data reliability, prevent tampering, and streamline oversight in a manner aligned with regulated sectors such as finance and energy (Bullion World, LBMA's New Gold Refinery Transparency Framework). LBMA Chief Executive confirmed to Reuters that the database launched in January, with refiners on the association's Good Delivery roster asked to begin voluntary reporting from January of the following year, and mandatory compliance for all listed refiners taking effect in 2027 (Reuters, LBMA's New Database for Gold Bars Will Be Mandatory for Listed Refineries from 2027). Refiners must submit annual reports covering the country of origin for the materials they procure, an obligation layered directly onto the LBMA's existing Good Delivery List gatekeeping function — since non-compliance risks suspension or delisting, a sanction that would effectively cut a refiner off from international trading channels (Bullion World, LBMA's New Gold Refinery Transparency Framework).
The GBI Database builds on an existing layer of mandatory refiner disclosure under the LBMA's Responsible Gold Guidance. Refiner management reports — such as the one published by Baird & Co. — already document a chain-of-custody or traceability system that identifies the geographic origin of gold and every upstream partner in the supply chain, and describe a due-diligence methodology requiring determination of the gold's origin, verification of transportation routing from origin to refinery, confirmation that sourcing does not breach international sanctions, and verification that mine sites are not located within World Heritage Sites (Baird & Co., LBMA Refiner Management Report). These reports also mandate identification and verification of gold-supplying counterparties' corporate registration and licensing information, and of Ultimate Beneficial Owners holding 10% or more ownership, using independent source documents rather than self-declaration alone (Baird & Co., LBMA Refiner Management Report).
The LBMA opened a public consultation on amended disclosure guidance in mid-2025 as part of formalizing the transparency framework ahead of the GBI Database's launch, a process that explicitly invited external stakeholder submissions (LBMA, public consultation announcement on amended disclosure guidance). Human Rights Watch submitted formal comments on 22 September 2025 directly addressing the LBMA's disclosure guidance, illustrating how origin-tracing rulemaking at the world's principal precious-metals self-regulator now routes through a comment process open to human-rights and civil-society organizations rather than remaining a closed industry consultation (Human Rights Watch, Submission re: the Disclosure Guidance of the London Bullion Market Association).
Founded in 2015 and running on the Hyperledger Fabric protocol, Everledger builds a “digital twin” for each diamond — a permanent record combining up to 40 metadata points, laser-inscribed serial-number photographs, cut, carat, and colour data, sourced through partnerships with major certificate houses in the United States, India, Israel, and Antwerp (itnews, Everledger Uses Blockchain to Stamp Out Blood Diamonds). The platform integrates the Gemological Institute of America's (GIA) Diamond Origin Report (DOR) directly into its provenance records with one-click discoverability, combining a scientific rough-to-polish match verifying origin with educational material on the people and places involved in each stone's production (Everledger, Diamonds industry solution page). Everledger holds ISO 27001 certification for information security, and its Provenance API returns complete provenance reports covering every transformation event from rough to polish alongside the underlying certificate report (Everledger, company homepage and platform overview). Retail integrations documented by Everledger include Fred Meyer Jewelers, Chow Tai Fook, and Brilliant Earth, while its API-driven partnership with diamond trading platform IDEX and the Zing Diamond Marketplace (operated by Jewelers Mutual) lets buyers filter listings specifically by provenance-report availability (Everledger, IDEX and Zing Bring Provenance to Light with Everledger).
Separately, the Provenance Proof Blockchain — the world's first digital ledger for tracking coloured gemstones, created by Swiss family-owned gemological house Gübelin on Everledger's underlying technology — has processed over 500,000 coloured gemstones spanning more than 50 gemstone types from over 50 countries, with more than 500 organizations registered on the platform including artisanal miners, cutters, jewellery brands, gemological testing laboratories, and retailers (Everledger, Provenance Proof Blockchain platform update). Data captured includes the specific circumstances under which a gemstone was mined, treated, cut, and set, written immutably once submitted though additional downstream events can still be appended as the stone moves through the value chain — a design intended to give consumers verifiable evidence of non-conflict, sustainably-mined origin (Everledger, Provenance Proof Blockchain platform update).
IBM Food Trust operates on the same underlying architecture — the open-source Hyperledger Fabric framework hosted by the Linux Foundation — applied to food rather than precious materials, allowing growers, suppliers, and retailers to share origin details, processing data, and shipping information on a permissioned blockchain network, with a dedicated certifications module verifying provenance of digitized certificates such as organic or fair-trade designations (IBM, IBM Food Trust Expands Blockchain Network to Foster a Safer, More Transparent and Efficient Global Food System). IBM's own documentation states the system can trace finished products, raw materials, and ingredients back to source in seconds rather than days, illustrating the operational speed gain that permissioned-blockchain traceability offers over paper-based chain-of-custody documentation — the same gain that LBMA's GBI Database and Everledger's diamond platform aim to replicate for metals and gemstones respectively (Baking Business, IBM Opens Up Access to Blockchain-Based Food System).
The Fairmined Standard for Gold and Associated Precious Metals, administered by the Alliance for Responsible Mining (ARM), certifies artisanal and small-scale mining organizations against requirements spanning formal legal mining practice, environmental protection, labour conditions, and traceability, verified by independent third-party auditors accredited by ARM on a regular audit cycle (Fairmined, The Fairmined Standard). The standard operates a full chain-of-custody system tracking certified gold from the mining organization through the refiner, bullion dealer or fabricator, and ultimately to the jeweller; every participant in that chain must hold a Fairmined licence issued by ARM and must maintain records demonstrating that Fairmined gold is kept physically segregated from non-certified material at every handoff (SkyJems, Fairmined Gold encyclopedia entry citing the ARM standard). Refiners processing Fairmined gold must themselves meet responsible-sourcing criteria and submit to audit, extending the certification's traceability requirement upstream into the refining stage rather than stopping at the mine gate (SkyJems, Fairmined Gold encyclopedia entry). Key substantive requirements embedded in the version 1.1 standard include a phased, audited commitment to mercury reduction and eventual elimination, an outright prohibition on child labour aligned with International Labour Organization conventions, and exclusion of industrial cyanide heap-leach processing as inappropriate to artisanal-scale operations (Alliance for Responsible Mining, Fairmined Gold Standard, Version 1.1).
The Responsible Jewellery Council (RJC), a not-for-profit standard-setter founded in 2005 and now counting over 1,000 members across 70 countries, operates two distinct certification tracks: the Code of Practices (COP), mandatory for all commercial members within two years of joining and covering the entire mine-to-retail supply chain, and the voluntary Chain of Custody (COC) standard specifically for tracking gold, silver, and platinum group metals through a fully traceable, responsibly-sourced chain (DNV, Responsible Jewellery Council (RJC) audits). The current 2024 version of the COP was approved by the RJC Board on 19 November 2024, introducing a new requirement (COP 7.2) obliging refiners to identify and report on the origin of mined and recycled gold to the RJC, alongside a strengthened know-your-customer obligation (COP 12.2) for members extracting RJC-scope materials from input substances on behalf of third parties (Responsible Jewellery Council, Code of Practices 2024). Certification follows a five-step cycle — self-assessment, independent third-party audit, audit report, certification decision, and periodic surveillance — with a mandatory surveillance audit required 12–18 months after certification start and full recertification every three years (Responsible Jewellery Council, Member Certification — COP). Firm 2025–2026 transition deadlines are already binding: from 1 January 2026, certification audits can no longer be conducted against the superseded 2019 COP or 2017 Chain of Custody standard, and members previously certified before 1 January 2024 who deal in RJC's new Laboratory-Grown Material Standard (LGMS) must complete a combined COP 2024/LGMS audit by 1 May 2026, while those certified after that date have until 31 December 2026 (Responsible Jewellery Council, Member Certification — COP).
The RJC announced a phased plan to strengthen diamond provenance claims through a new Supplementary Guidance to COP Provision 14 on diamond traceability claims, taking effect 1 January 2026, with a supporting audit toolkit to follow in the first quarter of 2026 (Responsible Jewellery Council, RJC Introduces Diamond Traceability Guidance). Because developing an entirely new traceability standard was not feasible in the near term within the RJC's ISEAL standard-setting framework, the organization opted for this two-phase interim approach, with the possibility of full integration into future COP/COC reviews beginning in 2027 in line with ISEAL requirements (Responsible Jewellery Council, RJC Introduces Diamond Traceability Guidance). RJC's blockchain engagement has historically been indirect — the certification body itself relies on third-party independent audits rather than operating its own distributed ledger — but its Code of Practices explicitly requires members to exercise due diligence in accordance with the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas, the same international reference framework that underpins LBMA Responsible Gold Guidance and most blockchain-provenance platform designs (Responsible Jewellery Council, Code of Practices 2024).