thumb|upright=1.2|Homole Ravine, Pieniny, Poland thumb|Shinturgen pine forest photographed from above. Enbekshikazakh District, Almaty Region, Kazakhstan. A ravine is a landform that is narrower than
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 0x6a66d46ae1fea261ee708fb7675297fcc85e906494786d93989bc115225c251e. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb515afd-48c4-4f0f-9696-95d59dd9eee8.json and https://artists.proofprofile.net/proofs/artist/cb515afd-48c4-4f0f-9696-95d59dd9eee8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).