"Celephaïs" () is a fantasy story by American horror fiction writer H. P. Lovecraft, written in early November 1920 and first published in the May 1922 issue of the Rainbow. It is part of the body of
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 0x731031739808542c7869f878173e8f56390dfe04a51ac18abe255b6940e2a18d. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d22ff6b0-674f-4c11-a189-4e4e41f360e7.json and https://artists.proofprofile.net/proofs/artist/d22ff6b0-674f-4c11-a189-4e4e41f360e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).