Variation in Timbre & Attack

Recording by John Robinson Pierce.

Recording identifiers

ISRC
QM6N21573895
CopyrightID (CopyrightChains transaction hash)
0x532dbf1088c0f67395728694e338e5e70f65776c844f5d8efe6a23e031421550
Copyright registration time
2026-07-07T10:58:19+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:8d563b3762dd4be89bfb7e936ac577f999d95391b058254e438f6344551178f2

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.