Die Fledermaus / Act 1: "Nein, nein, ich zweifle gar nicht mehr"

Recording identifiers

ISRC

NLA508901811

Release date of the album this recording appears on

1990-01-01

CopyrightID (CopyrightChains transaction hash)

0xdbfc8a2e7c7e65c3e5ecd7c298a8374a1f21129677d0682a308f1acaa1554794

Copyright registration time

2026-07-06T06:26:42+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-06T06:56:49Z

Bitcoin block

956889

Canonical record hash

sha256:31235f1442bc57f258597d053d38c6b6fa38fdce784de5f7138d3b9ba5c65303

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLA508901811

What this proof establishes

This recording was released in 1990, 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.