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 0x2b5d4aab978c557092410328698e41ed6b08d7240b14215d594b5b7d4ed253aa. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97ec3004-8ef9-44fa-860a-5a0462666076.json and https://artists.proofprofile.net/proofs/artist/97ec3004-8ef9-44fa-860a-5a0462666076.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Steward of Gondor (From "The Lord of the Rings: The Return of the King")
The Dreams of Trees (From "The Lord of the Rings: The Two Towers")
The King of the Golden Hall (From "The Lord of the Rings: The Two Towers")
From Past to Present (From "The Elder Scrolls V: Skyrim")
Samwise the Brave (From "The Lord of the Rings: The Two Towers")
The Leave Taking (From "The Lord of the Rings: The Two Towers")
The Road Goes Ever On... (From "The Lord of the Rings: The Fellowship of the Ring")
The Bannered Mare (From "The Elder Scrolls V: Skyrim")