Letter to Barbora
Recording by Uno Helmersson.
Recording identifiers
- ISRC
- USQX92002566
- CopyrightID (CopyrightChains transaction hash)
- 0x0bd4d85faabcc39a0c9160332de3b4da527bbdd919d01b82775f204e08d6c3ae
- Copyright registration time
- 2026-07-31T23:39:55+00:00
OpenTimestamps proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T23:51:35Z
- Bitcoin block
- 960481
- Canonical record hash
- sha256:cced1de9c896c514177e33f1af9b2621219220b5b63a68eb013d6c19d2e1c4bd
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.