Abderraouf Deradji (; born 10 December 1989), known professionally as Soolking, is an Algerian singer and rapper. He started his career under the pseudonym MC Sool until 2013 before adopting his new s
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 0xe515c5a25f1787a5531f7e5cbb6e9d2bd2b06b0139eaa6ef11cb9b1e8a188f20. 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/ccddbda7-798e-459d-920a-403d0b849680.json and https://artists.proofprofile.net/proofs/artist/ccddbda7-798e-459d-920a-403d0b849680.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).