Primero De Maio

Recording identifiers

ISRC

FRX620041040

Release date of the album this recording appears on

2011-03-17

CopyrightID (CopyrightChains transaction hash)

0x22f54a1835d58fe54762c32955bcb1127d5789f98f38d7c9873b453ea3378d5e

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T08:26:41Z

Bitcoin block

960368

Canonical record hash

sha256:0fc8539a19b07e6364acffeb9f9d71f96dd5667f0edb0cb10fa8d8291fadd8e9

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC FRX620041040

What this proof establishes

This recording was released in 2011, 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.