Die Fledermaus / Act 1: "Da schreibt meine Schwester Ida"

Recording identifiers

ISRC

NLA508901803

Release date of the album this recording appears on

1990-01-01

CopyrightID (CopyrightChains transaction hash)

0x3f7e4da70628e7b3a547e0dd85624d72585ca1d53b7493b35febc1574c87b1c4

Copyright registration time

2026-07-06T10:47:43+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-07T16:07:00Z

Bitcoin block

957061

Canonical record hash

sha256:9877192c56c89a371e151da1809ed4b476da5ac70a3eab5cae8314d23eb7f095

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLA508901803

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.