Die lustige Witwe, Act II: No. 9, Marsch-Septett. Ja, das Studium der Weiber ist schwer

Recording identifiers

ISRC

DEF057230408

Release date of the album this recording appears on

1985

CopyrightID (CopyrightChains transaction hash)

0x1a8f7ee8265533bcae2eab94d474889055458e9afec946849e41090d69e55017

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T04:47:22Z

Bitcoin block

960207

Canonical record hash

sha256:b2e566f92dc9dc4a564010a0420eb5672fe8a846954c9386780ed9769a2faaa1

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF057230408

What this proof establishes

This recording was released in 1985, 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.