ISRC DEF057730404
Verified recording
DEF057730404 is “Songfest: IV. To What You Said...” by Leonard Bernstein,
registered on the CopyrightChains blockchain with CopyrightID
0x4f9dc7a70a03beb6a0fa2fd5efd0638dd85f95b37f429c5f9783f350190c22cd and independently timestamped
in Bitcoin block 960264 on 2026-07-30.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057730404.
Recording identifiers
- ISRC
- DEF057730404
- Title
- Songfest: IV. To What You Said...
- Artist
- Leonard Bernstein
- CopyrightID (CopyrightChains transaction hash)
0x4f9dc7a70a03beb6a0fa2fd5efd0638dd85f95b37f429c5f9783f350190c22cd
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-30T14:36:16+00:00
- Bitcoin block
- 960264
- Canonical record hash
sha256:ccc804fd6cc5963e3371cbe31451c6e8517ba7870482bcdd4f5772540a5c6329- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057730404
- Bitcoin block existence check
- https://blockstream.info/api/block/960264
Full record
Track page: Songfest: IV. To What You Said... · Machine-readable JSON-LD