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 0x08c1dc6196b634e51e7d7febf3dfe8c6449a294d11f0f8e7c205739e1aca27e4. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd2ff668-e69e-4b71-81b2-8e1ccadede32.json and https://artists.proofprofile.net/proofs/artist/fd2ff668-e69e-4b71-81b2-8e1ccadede32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Of Tuor, Idril and their Departure from Gondolin
Of the Men of Dor​-​lomin and Their Sacrifice in Nirnaeth Arnoediad
Of the Sea-Longing and the Journey to the West