A La Sorda

Recording by Martin Castillo.

Recording identifiers

ISRC
USA2P2113264
CopyrightID (CopyrightChains transaction hash)
0x3c835aef1fabf490c9ebb4b3a835d5724491a049caaea8698740cce47ac41e48
Copyright registration time
2026-06-27T08:18:37+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T03:55:08Z
Bitcoin block
956304
Canonical record hash
sha256:53265f69f59d7b93152bd747199ec8ea280175f8b869d6e006a22f8e5aed2380

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.