Laster may refer to: Laster (surname) Laster (band), a Dutch metal band Das Laster, a 1915 German film Laster, a Transformer in the 1989 anime series Transformers: Victory
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 0xf9783d99adfb7e63e89fbc693d22fc1378347ef17d2b78865c5299709eacc80c. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a1f7b6b-22ec-43c3-b1d9-a08a8e9286bd.json and https://artists.proofprofile.net/proofs/artist/4a1f7b6b-22ec-43c3-b1d9-a08a8e9286bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).