La Bohème / Act 4: "Che ha detto il medico?"

Recording identifiers

ISRC

NLA507719932

Release date of the album this recording appears on

1979-12-01

CopyrightID (CopyrightChains transaction hash)

0x179367c05cfe952c90efea29efb77f72a91fcef3edeb981156e3c8aed29059e3

Copyright registration time

2026-07-31T19:31:53+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T19:53:57Z

Bitcoin block

960456

Canonical record hash

sha256:77f5ef191b27f5f0ad9d567b4c8ca044a468309a7b6267ca600d1746e3667ebd

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLA507719932

What this proof establishes

This recording was released in 1979, 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.