The Threepenny Opera: Moritat von Mackie Messer (Mack the Knife)

Recording identifiers

ISRC

USSM15500050

Release date of the album this recording appears on

1955

CopyrightID (CopyrightChains transaction hash)

0x0fdbc652b2ae4c3af00fd37dd9b6c70d11cb73a04e85e0a9bbb091efa66a0721

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T18:48:12Z

Bitcoin block

960448

Canonical record hash

sha256:6b602ffb8061ef1379921f14546db947e5171d8cfc67d1db50444cfd1a3f35f1

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC USSM15500050

What this proof establishes

This recording was released in 1955, 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.