The Merry Widow / Act 2: Duet: Love unspoken, love unbroken

Recording identifiers

ISRC

GBF077742414

Release date of the album this recording appears on

1978-01-01

CopyrightID (CopyrightChains transaction hash)

0x77d320b7da5522a275c4cb02c1005c34f34202b8d9f395b0bd5f54ea31f74739

Copyright registration time

2026-07-29T20:23:18+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-29T21:09:47Z

Bitcoin block

960144

Canonical record hash

sha256:f66320642e8045cbcb2388bc289b02b288c0ea42fa67c690993a7a059631e184

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBF077742414

What this proof establishes

This recording was released in 1978, 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.