La Bohème, Act II: Musetta's Waltz

Recording identifiers

ISRC

USSM16201257

Release date of the album this recording appears on

1972

CopyrightID (CopyrightChains transaction hash)

0xe527cc1475aba504cf092de77c3a3721a287b7f5819220cce4861e33b7bbd996

Copyright registration time

2026-06-23T00:35:36+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:55:08Z

Bitcoin block

956304

Canonical record hash

sha256:7937d2659cb6f0f8b4f05f03fe6cce200e548cbf5117a8802d4d9f1db72b2b7e

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC USSM16201257

What this proof establishes

This recording was released in 1972, 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.