Ach wie flüchtig, ach wie nichtig BWV 26

Recording identifiers

ISRC

NLK170300176

Release date of the album this recording appears on

2007-03-06

CopyrightID (CopyrightChains transaction hash)

0xeaa087ffcbfee4865ba659c02c72c61aab65c0887af81fdee23e60dc6e2ebde7

Copyright registration time

2026-07-31T13:37:02+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T15:20:33Z

Bitcoin block

960419

Canonical record hash

sha256:2b61e17df0994059523a43d89d1f6a61203cf0ab6b0b986aa5ce69b50fb1e7d3

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLK170300176

What this proof establishes

This recording was released in 2007, 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.