The Merry Widow, Act II: Opening Polonaise (Arr. John Lanchbery and Alan Abbott)

Recording identifiers

ISRC

AUAB09950445

Release date of the album this recording appears on

1999-01-01

CopyrightID (CopyrightChains transaction hash)

0xda0f1df7dc47409376b6bd93ca1c476f550dea989ec9c55a4857737d46db4fe4

Copyright registration time

2026-07-07T19:06:39+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:22:41Z

Bitcoin block

957120

Canonical record hash

sha256:f0c0c8d3fd03af06168f3316996dd2dd844e20268e721e01a90f14f72de15185

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC AUAB09950445

What this proof establishes

This recording was released in 1999, 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.