Joris Vanvinckenroye (born 1977), also known by his solo moniker BASta!, is a Flemish avant-rock and experimental double bass musician and composer. He is best known for Aranis, a neo-classical chambe
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 0x8002f7a99dc37b83ff96eff484f83720f97ec6956aae8b5cc502c18a1745fe75. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8275aea-80bc-478a-be36-88d095a3c23e.json and https://artists.proofprofile.net/proofs/artist/e8275aea-80bc-478a-be36-88d095a3c23e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.