Solos for Voice 2

Recording by John Cage.

Recording identifiers

ISRC
USSM11307912
CopyrightID (CopyrightChains transaction hash)
0xa9d2d6ea6faa11ae41f78248e35fa0f9bb72028c12c1bdeffa8063528b9b020a
Copyright registration time
2026-07-07T09:44:08+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:f06266d1896ce4231649d59d9d1e2632f544f961e03a8e3ea22b5b6b2facfaba

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.