thumb|A depiction of the mythical dahu The dahu () is a legendary creature that resembles a mountain goat and is well known in France and francophone regions of Switzerland and Italy, including the Ao
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 0x632744d826cc1f910d12022b2b361e9a185747a9cf06149b89d9615a55e975e0. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f3df2de-0356-4ebd-82a2-8ecd17700bf0.json and https://artists.proofprofile.net/proofs/artist/1f3df2de-0356-4ebd-82a2-8ecd17700bf0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Steyoyoke Black Reconstructed by Animal Picnic