thumb|Tagada in the Vienna Wurstelprater A tagada is an amusement ride made by various manufacturers. Riders sit in a round bowl with bars, but no seatbelts or restraints (except for harnesses in the
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 0xdc771da35c06cbaa251c1fadfa5a70109982cf389fec7732eaf3a84a7c9969c8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fd21801-fba4-48ef-b3be-87ed061dea5f.json and https://artists.proofprofile.net/proofs/artist/6fd21801-fba4-48ef-b3be-87ed061dea5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).