thumb|Classical shōka arrangement from the Sōka Hyakki thumb|Illustration of the principal lines used in seika, which are "heaven", "human", and "earth" is a form of ikebana. Written with the same ka
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 0x68f30accf7f4f6e167dc109dc24f99f5acbfca3bd51ca50c286c042bd50c6bc8. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1368149-e74a-4aa5-a124-16c58df3e7d3.json and https://artists.proofprofile.net/proofs/artist/e1368149-e74a-4aa5-a124-16c58df3e7d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).