Otoño Porteño

Recording by Astor Piazzolla.

Recording identifiers

ISRC
USA560306551
CopyrightID (CopyrightChains transaction hash)
0xa477dc815cc2e52d38e91adcf57b1491a4241cb242a9a5ab06782d819bd4bbc8
Copyright registration time
2026-06-19T12:26:34+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T03:30:09Z
Bitcoin block
956302
Canonical record hash
sha256:b659c3f0e0df2846f4bc266378d2a2d80a8b67b43ad8cb4a7eef387c425bcedc

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.