Prelude and Fugue in B flat (WTK, Book II, No. 21), BWV 890: Prelude

Recording identifiers

ISRC

NLA508500489

Release date of the album this recording appears on

2009-01-01

CopyrightID (CopyrightChains transaction hash)

0x1b373e9f355eee4baef8c663e2104998a40adabd7f7340c9ec7f14d7e682aed5

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T08:30:10Z

Bitcoin block

960229

Canonical record hash

sha256:3843b6622216f890b246fba3a6dbe801c079f97cc6563ef6e6d861ad9e9f93ec

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLA508500489

What this proof establishes

This recording was released in 2009, 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.