Soir d'hiver

Recording by Nadia Boulanger.

Recording identifiers

ISRC
ES75S1900807
CopyrightID (CopyrightChains transaction hash)
0x4e5e2ffa08d7f75fde5a07d73a889ce0a3d1f1a2de6a6375131445ba862ab3a6
Copyright registration time
2026-07-07T17:15:42+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:22:41Z
Bitcoin block
957120
Canonical record hash
sha256:2ae828f7bdd9c61a3d0ad20a4f95c53b871ea7effa67d7b3eb0dba20bc6ce53d

What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. 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.