Sonata for Two Pianos: II. Grave
Recording by Willem Pijper.
Recording identifiers
- ISRC
- NLK4J2200002
- Release date of the album this recording appears on
- 2022-04-29
- CopyrightID (CopyrightChains transaction hash)
- 0xd58790b5fafe06a100ad89062f0655ab632c6cab6bb667bde458764417a4cec6
- Copyright registration time
- 2026-07-06T21:13:14+00:00
OpenTimestamps proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:20:19Z
- Bitcoin block
- 957118
- Canonical record hash
- sha256:283cbb9d10cdab820bc8b6a0ece8b7d290318921a76fc87687eece789f2d840e
- Verify the CopyrightID on CopyrightChains
- Verify the Bitcoin block independently
- Read the machine-verifiable OTS result
- Download the anchored registration record (its SHA-256 is the canonical record hash above)
- Download the OpenTimestamps proof (.ots) for that record
- Recording evidence summary for ISRC NLK4J2200002
What this proof establishes
This recording was released in 2022. ProofProfile's artist catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and this recording entered the record through cc-db-prod's ISRC-linked registration. Its provenance rests on the dates stated above rather than on the era of that source corpus.
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.