Root of an Unfocus

Recording by John Cage.

Recording identifiers

ISRC
HKI190020409
CopyrightID (CopyrightChains transaction hash)
0xce572d1561e7c713913833a8c8a48f917ac7073f19371300da0ce4cd9bb2b634
Copyright registration time
2026-07-29T14:23:21+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-29T15:22:21Z
Bitcoin block
960121
Canonical record hash
sha256:b8f789d84900dbc74545160ee6fc5022fef71c02b20c6be37acd4ac10578ba36

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.