The Building Safety Act requires you to prove what every building record contained, and when it was true, from design to occupation.

Issuing and recording design change authorisations during the construction phase, including sign-off records from the principal designer and approvals from the dutyholder.

Timestamp each design change authorisation at the moment it is signed off. When a structural failure, personal injury claim, or Building Safety Regulator inquiry demands to know whether the change was authorised before work commenced, the blockchain record proves it independently of the file's own metadata.

Under the Building Safety Act 2022, dutyholders who fail to maintain the golden thread of building information face unlimited financial penalties. A design change that cannot be proven to have been authorised before the work proceeded is a direct route to regulatory enforcement.

Preparing, reviewing, and issuing the pre-construction information pack and construction phase plan before breaking ground, as required by CDM 2015.

Timestamp the construction phase plan and any material revisions at the moment they are issued. Proves to an HSE inspector or in a personal injury claim that the plan existed and was current when the site became active, not that it was compiled retrospectively after an incident raised questions.

Failure to prepare an adequate construction phase plan before construction work begins is one of the most common grounds for CDM 2015 prosecution. In the past 12 months alone, 17 CDM prosecutions have been brought. Principals face personal liability as well as company fines.

Verifying and recording the competency of workers, subcontractors, and specialists before they carry out design, management, or construction work.

Timestamp each competency record and site induction at the moment of completion. If an incident prompts an inquiry into whether an operative had the required competency at the time of the activity, the blockchain record proves the check was done before the work started, not after.

Glovers Court Ltd was fined £165,000 (HSE, June 2025) for ignoring fire safety requirements during construction works. The prosecution found that fire safety was not adequately managed during the construction phase. CDM 2015 requires every dutyholder to make sure that all workers have the skills, knowledge, experience, and training to carry out their work.

Preparing Risk Assessment and Method Statements (RAMS) for high-risk activities including work at height, excavation, demolition, and hot works.

Timestamp each RAMS document at the point of approval. Provides an independently verifiable record that the safe system of work was defined and approved before the activity commenced, not that documentation was created retrospectively to satisfy an investigation.

In a personal injury claim arising from a construction site accident, the absence of a contemporaneous RAMS for the relevant activity is treated as evidence that the activity was not safely planned. Independent timestamps remove the ability of opposing experts to challenge the document's creation date.

Creating and maintaining the golden thread of information for higher-risk buildings, including all safety-critical design decisions, change records, and occupation-phase records.

Timestamp every golden thread record at the moment of creation. The Building Safety Act 2022 requires that the information in the golden thread must be accurate and up to date. An independent blockchain timestamp is the only way to prove the record is accurate at the time it was created, not retrospectively compiled.

The Building Safety Regulator has powers to issue compliance and stop notices, impose unlimited fines, and bring prosecutions for breaches of the Building Safety Act. The Act explicitly requires that all safety-critical information must be maintained in a way that proves what was known and when.

Producing and handing over the fire safety information pack for occupied buildings, covering as-built drawings, installed systems, and maintenance requirements.

Timestamp the fire safety information pack and all as-built drawings at the moment they are completed. Proves to the building owner, the responsible person under the Regulatory Reform (Fire Safety) Order 2005, and any fire authority inspector that the information reflects the building as it was constructed, not as it was later documented.

The Grenfell Tower Inquiry identified the absence of reliable, contemporaneous building records as a systemic failure that contributed to the inadequacy of fire safety management. The Building Safety Act 2022 was enacted directly in response. Failure to maintain accurate fire safety information can result in enforcement action by the fire authority and the Building Safety Regulator.

Producing and maintaining structural calculations, engineering drawings, BIM models, and specifications for construction projects.

Timestamp engineering drawings and specifications at the moment they are completed and issued. In a dispute about whether a design was copied from another project, or whether a subcontractor's drawing preceded the contractor's version, the blockchain record proves which existed first without disclosing the content of the drawing.

Engineering and architectural drawings are protected by copyright as soon as they are created. Disputes over first authorship are determined by who can prove creation date, not who holds the copyright registration. Without an independent timestamp, any claim of priority relies entirely on metadata the claimant controls.

Compiling and handing over the CDM health and safety file to the principal designer and building owner at project completion.

Timestamp the H&S file and each constituent record at the point of completion. Proves to the building owner and any subsequent occupier that the file was current at the point of handover, and that the records in it reflect the building as constructed, not as later documented for litigation or insurance purposes.

Disputes about the completeness and accuracy of the CDM health and safety file at handover are common in construction litigation. Without independent timestamps on each record, there is no way to prove the file was current at the moment of completion rather than assembled to resolve a later dispute.