Vals No. 4

Recording by Agustín Barrios Mangoré.

Recording identifiers

ISRC
USSM19402003
CopyrightID (CopyrightChains transaction hash)
0xc2201977124d8d9a423224b8a67bf7a6dd02b5e20cfd035dee731ae069c8d8f8
Copyright registration time
2026-06-25T08:06:46+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T03:55:08Z
Bitcoin block
956304
Canonical record hash
sha256:c88a31b8ccd195c33ffadf03df2098b8196faf375c501277f3ddfa5098436248

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.