Artists employ meticulous methods to document and authenticate metal sculptures, ensuring their provenance and long-term value. One common practice is embedding a signature or unique mark directly into the sculpture, often in a discreet location. Many creators also issue certificates of authenticity, detailing materials, creation dates, and ownership history.

Advanced techniques include 3D scanning to create digital fingerprints of the artwork, which can be stored in blockchain-based registries for tamper-proof verification. Some artists maintain detailed workshop logs with photographs documenting each stage of creation.

Galleries and foundries frequently provide supplementary documentation, while appraisal reports from accredited experts further validate a piece's provenance. For large-scale works, engineers' structural reports may serve as additional authentication.

Contemporary artists increasingly use QR codes or NFC chips embedded in sculptures, linking to permanent online records. These digital solutions complement traditional methods like foundry marks or edition numbers for limited series works.

Proper documentation not only protects against forgeries but also establishes an artwork's historical and market significance, making it crucial for collectors, insurers, and future conservators. The most robust systems combine physical markings, paper trails, and digital verification for comprehensive provenance tracking.