1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b56d8e3e6c0f37ab46593cdb0314c25073e99041c0bb0ff067e2712eef587c8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/788ee004-6b8d-4488-aece-3d3c4876ac54.json and https://artists.proofprofile.net/proofs/artist/788ee004-6b8d-4488-aece-3d3c4876ac54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
You Don’t Know What Love Is (alternate take)
The Christmas Song (Chestnuts Roasting on an Open Fire)
Van der Grinten/Herman Quartet: Lost Languages in Sad Serenades & Jocular Jazz
The Crane Child (The Lost Language of Cranes) (feat. Henk Zomer)
Hoog (part II of Hard, Hoog & Ver) (feat. Henk Zomer)
An den Kleinen Radioapparat (a.k.a The Secret Mariage)
The Van der Grinten/Herman Quartet: Psychodixie for C-Melody Saxophone
Cement Mixer (Put-ti Put-ti) (feat. Henk Zomer)