PLS or Pls may refer to: Organizations Pioneer Library System, Oklahoma, US Poculi Ludique Societas, Medieval & Renaissance Players of Toronto, Canada Profesjonalna Liga Siatkówki, Polish Volleyba
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 0xb10561b222ff107929af369b1ed08b0a144a1cd897f6a10d8a987232960f1eae. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbc4e7fc-d411-48bc-88b9-addfcffcab06.json and https://artists.proofprofile.net/proofs/artist/fbc4e7fc-d411-48bc-88b9-addfcffcab06.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).