Labello is a brand of lip balm stick. It is produced by Beiersdorf AG in Germany and Austria. The labello lip care sticks are also sold under the name Labello Nivea, Liposan and Nivea Lip Care. Label
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 0x2bc32771f6997f28163d855fe1f08c8858f660d5a027ec2ad65b2cd4afa2560b. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0197d66-fedb-47b6-a616-a1dd4578a966.json and https://artists.proofprofile.net/proofs/artist/d0197d66-fedb-47b6-a616-a1dd4578a966.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).