Urs Widmer (21 May 1938 – 2 April 2014) was a Swiss novelist, playwright, an essayist, and a short story writer. Biography Widmer was born in Basel in 1938, and for many years lived in Zurich. Widmer
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 0x8a1c4bb94d3154da0dbb21c7225e5b200d1c20aca65124911f6269f955e99878. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec2072e8-32cf-4274-8718-c99bfcacddc3.json and https://artists.proofprofile.net/proofs/artist/ec2072e8-32cf-4274-8718-c99bfcacddc3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die schönsten Geschichten aus Tausendundeiner Nacht (Gekürzt)
Reise an den Rand des Universums (Ungekürzt)