A Carta

Recording by Eduardo Costa.

Recording identifiers

ISRC
BXEC12300175
CopyrightID (CopyrightChains transaction hash)
0x233540a4649b78632530b3b8ab961a38b9688e80c25544d895ff1fe51f584177
Copyright registration time
2026-06-19T11:26:38+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T03:30:09Z
Bitcoin block
956302
Canonical record hash
sha256:4b44c2b3504c65fd14f8c129cc2a9dda56748e48fccdfcef9f39f123cf71d7bb

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.