The torso or trunk is the central part, or the core, of the body of many animals (including human beings), from which the head, neck, limbs, tail and other appendages extend. The tetrapod torso — inc
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 0x430ae337ebbc87bae961a472923229cc21df95aac70b9f3652db0366a63e8d8b. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de2c548c-ef37-491c-b567-2da7e1f0744b.json and https://artists.proofprofile.net/proofs/artist/de2c548c-ef37-491c-b567-2da7e1f0744b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).