thumb|Some common brands of packaged instant dashi is a family of stocks used in Japanese cuisine. Dashi forms the base for miso soup, clear broth soup, noodle broth soup, and many simmering liquids
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 0xd57aede4042a13e11115a00feb13b3045a3f78b393496c98eb82e9d677da6c9e. Chain 2 (Bitcoin): anchored in block 954139 (2026-06-17T21:12:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8005c195-c153-4248-8c7f-82ff9b038af3.json and https://artists.proofprofile.net/proofs/artist/8005c195-c153-4248-8c7f-82ff9b038af3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).