The Portland Cement Factory At Monolith California

Recording identifiers

ISRC

USFI86700092

Release date of the album this recording appears on

1967-01-01

CopyrightID (CopyrightChains transaction hash)

0x2856739a11f6bfc0bcc495e8d7bb3395d4650ae35c9372a886ce66729f06e071

Copyright registration time

2026-06-11T21:40:47+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-06-13T13:32:09Z

Bitcoin block

953520

Canonical record hash

sha256:73dd2e82049cf00bdbc594df1541915f7d202661de072cf16e0b581afe8e9135

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC USFI86700092

What this proof establishes

This recording was released in 1967, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and 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.