40 Days

Recording by Dave Brubeck.

Recording identifiers

ISRC
USSM16501327
Release date of the album this recording appears on
2003-10-10
CopyrightID (CopyrightChains transaction hash)
0x737850374783c9e6b8d72bc41caf6b68e38327df2c73ac372ad5654471c95b7d

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-31T02:19:15Z
Bitcoin block
960334
Canonical record hash
sha256:9a06389e71710e08b5b7385ebed48b06240ec29f52c8fde3c4ff73720e2d66c6

What this proof establishes

This recording was released in 2003, 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.