Halldór Kiljan Laxness (; born Halldór Guðjónsson; 23 April 1902 – 8 February 1998) was an Icelandic writer and winner of the 1955 Nobel Prize in Literature. He wrote novels, poetry, newspaper article
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa905af08fa45d5fdda08a4e98e98ab7c90856d167e2e2634a097e5f10cd0a732. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08bef307-fa6f-4255-a179-4c6882d1d22b.json and https://artists.proofprofile.net/proofs/artist/08bef307-fa6f-4255-a179-4c6882d1d22b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).