Kyrie III

Recording by Guillaume de Machaut.

Recording identifiers

ISRC
USNO19745716
CopyrightID (CopyrightChains transaction hash)
0x4ef2d51a6c349eb246331ef4a765ec1949e62cfc04a7454d0c62b79cd5e7db2b
Copyright registration time
2026-07-06T18:57:47+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:22:41Z
Bitcoin block
957120
Canonical record hash
sha256:37413bbdf727b27ba67bfac44f811ea96ad9ed9b73aeddfc86c01d11db71f562

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.