thumb|A Shiba Inu poses atop a sign promoting the dog beach in Huntington Beach, California A dog beach is a public beach area designated as a dog park. The spaces allow dogs to swim recreationally as
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fcd326b4033863f89d8311675f68a0f37bd0bd98b1ee5bca7140961215eb63. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/389e7377-ddbc-4999-bd28-3e97cf45ec52.json and https://artists.proofprofile.net/proofs/artist/389e7377-ddbc-4999-bd28-3e97cf45ec52.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).