Gran Vals

Recording by Francisco Tárrega.

Recording identifiers

ISRC
NOBRA0801050
CopyrightID (CopyrightChains transaction hash)
0x9c201b0be492d6fbdc2774f70d8f521c4afdef80ce3601549ebc6e1eb127e3bb
Copyright registration time
2026-07-07T04:30:21+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:c528cd2e4a4f9a067ce0047fa15114c7a4e5b54ab308bb04b7a7cef26aa04082

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.