National Anthem of Portuguese Republic

Recording identifiers

ISRC

CZD940900027

Release date of the album this recording appears on

2009-04-24

CopyrightID (CopyrightChains transaction hash)

0xbfa2048f64e0935461837ed129cf0860a4247dc2401715f85b919559a393cc08

Copyright registration time

2026-07-31T05:51:21+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T06:42:11Z

Bitcoin block

960360

Canonical record hash

sha256:7cbdb765e94e32ff14258b139e4f31578c019e0782fd1052a0999aa4378d1d28

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC CZD940900027

What this proof establishes

This recording was released in 2009, 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.