Sorrel (Rumex acetosa) is a perennial herbaceous plant in the family Polygonaceae. It is also called common sorrel, garden sorrel, spinach dock and narrow-leaved dock ("dock" often used for the genus)
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 0x5d17769e9ada3629624691c02cd116d05c4599e687db4dc5318e74d69f026c5a. Chain 2 (Bitcoin): anchored in block 953895 (2026-06-16T05:46:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f3e1183-2320-4fb5-9f02-00ad7f9a93f5.json and https://artists.proofprofile.net/proofs/artist/0f3e1183-2320-4fb5-9f02-00ad7f9a93f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).