Cara a Cara

Recording by Chico Buarque.

Recording identifiers

ISRC
BRRGE6900004
CopyrightID (CopyrightChains transaction hash)
0x0ab2d284f51c95c7fd205c00010195c340086cf96011f0be1fc6e21f4091b081
Copyright registration time
2026-07-22T13:36:18+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-22T14:03:35Z
Bitcoin block
959137
Canonical record hash
sha256:b72bdab5e37d0db2236a7365968faf6df319ccceecaec911c145202e580e8208

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.