Coltsfoot is the common name for several plants in the family Asteraceae: Homogyne alpina, a plant species native to Europe Petasites, a plant genus native to Europe, Asia, and North America Tussi
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 0x4746e87649fa6ad205cc4a453c12dc4f84329c4f9b60d0fd6bc73b7b5048c884. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5a7c87b-2550-4181-ae64-9ce59819269b.json and https://artists.proofprofile.net/proofs/artist/d5a7c87b-2550-4181-ae64-9ce59819269b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).