Le nozze di Figaro, K. 492: "Ich weiß nicht"

Recording identifiers

ISRC

DEF056131705

Release date of the album this recording appears on

1962-07-01

CopyrightID (CopyrightChains transaction hash)

0x9edaedca99358f96dc18a358c3ced48672d93516c28a9545a99ebfd4e0dde306

Copyright registration time

2026-07-31T15:09:43+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T15:20:15Z

Bitcoin block

960418

Canonical record hash

sha256:dd78801922faf1df693618c59fc1ed719ad29b458f6e99482cd78a1d0b6a6bb0

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF056131705

What this proof establishes

This recording was released in 1962, 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.