Firs are evergreen coniferous trees belonging to the genus Abies () in the family Pinaceae. There are approximately 48–65 extant species, found on mountains throughout much of North and Central Americ
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 0x7fd1d76334a0db073531dd200bc6b5f2855cbc58e58896e5bd0653c0a7a72b38. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e8c7da7-4d22-4611-bf45-1184e970fbf5.json and https://artists.proofprofile.net/proofs/artist/7e8c7da7-4d22-4611-bf45-1184e970fbf5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).