Schutzhund (/'ʃʊtshʊnt/, German for "protection dog"), currently known competitively as IGP and previously as IPO, is a dog sport that tests a dog's tracking, obedience, and protection skills, and ev
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 0xb4e15069c33338d4d2bb2b01d4a472bb73e91a21eeba23db533db8c463595f67. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b482453d-9b04-4c53-a505-df9295c9b0a5.json and https://artists.proofprofile.net/proofs/artist/b482453d-9b04-4c53-a505-df9295c9b0a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).