alt=|thumb|Coat of arms of the Trolle family The House of Trolle is the name of a noble family, originally from Sweden. The family has produced prominent people in the histories of Sweden and Denmark
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 0xc384756d85f5a1ab00ff2cb6c7f04fe428c98147f4eea57fc47a078f54067519. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad32df12-8e15-43c1-8010-8c9b4cd1031a.json and https://artists.proofprofile.net/proofs/artist/ad32df12-8e15-43c1-8010-8c9b4cd1031a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).