Hardsoul is a duo of house music producers and DJs from the Netherlands, made up of the brothers Rogier (DJ Roog) and Greg van Bueren. Biography Founded in 1997, Hardsoul began releasing music on Sou
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb87bf051a3a3534b4c0492e0697e144058dbbedcca2ddbdd05841220fa7230. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e03c77fe-1e6c-4335-9195-73cf3407ebba.json and https://artists.proofprofile.net/proofs/artist/e03c77fe-1e6c-4335-9195-73cf3407ebba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).