L0 may refer to: Haplogroup L0, a human mitochondrial DNA haplogroup L0 norm, a norm in mathematics L0 Series, a high-speed maglev train operated by the Japanese railway company JR Central See al
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 0x3a16e6b4dcab7e95080e231c1fc2cee1e6ed99b7b739a1cf0492c19e68776afb. 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/c6562cd7-b8e6-4583-9f43-2f9a371ba0bd.json and https://artists.proofprofile.net/proofs/artist/c6562cd7-b8e6-4583-9f43-2f9a371ba0bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).