In a Landscape

Recording by John Cage.

Recording identifiers

ISRC
CALC41501655
CopyrightID (CopyrightChains transaction hash)
0xa8f687e09f143c94dde90a2dc1104bc1cf1d09a8023c4c8643a909abeced29c2
Copyright registration time
2026-07-30T05:29:43+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-30T05:43:45Z
Bitcoin block
960212
Canonical record hash
sha256:1eff98f968d2436513bfb3a24ae404a06243a0b041ad29190359f91db0af195a

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.