Sandy Mouche is a Swedish band from Lund, Skåne County. It consists of songwriter and singer couple Martinique and Helena Josefsson, and brothers Per (drums) and Ola (guitar) Blomgren. For live shows
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 0xcc8fa10d2de25a712fd506241ba40236550543e5c87580a07ff7af7ae14dc70b. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ced7ddb1-850a-42d9-bd09-8e622cdadc65.json and https://artists.proofprofile.net/proofs/artist/ced7ddb1-850a-42d9-bd09-8e622cdadc65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).