Kurt Hermann Eduard Karl Julius Schwitters (20 June 1887 – 8 January 1948) was a German artist. He was born in Hanover, Germany, but lived in exile from 1937. Schwitters worked in several genres and
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177719d51c2afe8db12adc23ff94a635e0fd9118093231f8ffc48e336ad6a8eb. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c011a440-f64b-4c51-a539-98edbe6e00e3.json and https://artists.proofprofile.net/proofs/artist/c011a440-f64b-4c51-a539-98edbe6e00e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kurt Schwitters: Ursonate und andere konsequente Dichtung