thumb|Papery (upper) and leafy bracts on Rhinanthus minor (hay rattle). All the "leaves" in this image are bracts. In botany, a bract is a modified or specialized leaf, associated with a reproductiv
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 0x990dd7889816884e74adfdcb2e7f31ad5d960fd46b8c33e9e1bbf67af564a41c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5c48c0b-36ca-4173-b2c3-e70cc4180313.json and https://artists.proofprofile.net/proofs/artist/b5c48c0b-36ca-4173-b2c3-e70cc4180313.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).