Uma Carta para a Saudade

Recording identifiers

ISRC

BC19I2100013

Release date of the album this recording appears on

2021-11-26

CopyrightID (CopyrightChains transaction hash)

0xb3c6681a9a21c1d3a5c5ca9f7bc4c8912e57ac00970bc89ee01e82804ce1108a

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T10:42:33Z

Bitcoin block

960247

Canonical record hash

sha256:21e4a9aee397f14136a395ad74fc2ac72e96037039ca0532e882242274b434a9

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC BC19I2100013

What this proof establishes

This recording was released in 2021, 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.