Maribelle (born Marie Kwakman on 4 April 1960) is a Dutch singer, best known for her participation in the 1984 Eurovision Song Contest. In 1981, Maribelle performed two songs, "Marionette" and "Fanta
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 0x82eaf207908665676d847e64fc30d26cf58c041156aad2772750d6ab03fa26d6. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/830796f4-3714-4c10-a36b-166672fcb413.json and https://artists.proofprofile.net/proofs/artist/830796f4-3714-4c10-a36b-166672fcb413.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).