Two Voices

Recording by Nico Muhly.

Recording identifiers

ISRC
DEN961301990
CopyrightID (CopyrightChains transaction hash)
0xc7a4a4ee50b7ba4053dfcc0871aec07ef590539a9d36aa3166874c71f9adf7a7
Copyright registration time
2026-07-07T12:42:44+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:53:27Z
Bitcoin block
957124
Canonical record hash
sha256:4aa4ab0c5d40b24737706a8c0e44446dfe99740785d9bc34df43245468547940

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.