thumb|upright=1.3|Look at them, troll mother said. Look at my sons! You won't find more beautiful trolls on this side of the moon. (1915) by John Bauer A troll is a being in Nordic folklore, including
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 0x9d1b52661e8efd7a79c68341bbda787db52b6aa26980397f5c95011ea7e7e9e3. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f20343b-e496-41b2-84f3-0019e1c58e9f.json and https://artists.proofprofile.net/proofs/artist/3f20343b-e496-41b2-84f3-0019e1c58e9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).