The Mamas were a Swedish-American pop and soul group. They won Melodifestivalen 2020 with their single "Move", which reached number one in Sweden in March 2020. Career The group consists of Ashley Ha
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 0x72b71cd7acbae41b41e7bffcbe96d4f06af447518101eba207dcc00ba42b68ad. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ee96550-f988-44c6-942f-af68a031b453.json and https://artists.proofprofile.net/proofs/artist/5ee96550-f988-44c6-942f-af68a031b453.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).