Le nozze di Figaro, K.492 / Act 3: "Hai già vinta la causa!"

Recording identifiers

ISRC

DEF059030454

Release date of the album this recording appears on

1991-01-01

CopyrightID (CopyrightChains transaction hash)

0x437dca8cb262b773cb5231b08f9f3ba3f2ee57087a357d640938bf54c7cce666

Copyright registration time

2026-06-21T05:08:31+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:30:09Z

Bitcoin block

956302

Canonical record hash

sha256:a8e30c686314251f7343aaf437ca8c3cf5340601d60eb7a47189b2e9f5d570f9

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF059030454

What this proof establishes

This recording was released in 1991, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and ISRC is the stable recording-level bridge from that source corpus to the authoritative cc-db-prod track record.

CopyrightChains and Bitcoin OpenTimestamps make the exact committed record independently verifiable today. The cryptographic proof does not by itself establish authorship or ownership of the underlying recording.

Read the complete pre-generative-AI provenance and verification method.