Doll by Doll were a British rock band based in London. The band was formed by Jackie Leven in 1977. They came to prominence during the new wave period but were largely ignored by the music press of th
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 0xa4892c65e06fb9a5ec848b75fc5c4d79d5fdbc91536b0cb597e6ad89dce5598f. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbb1d497-eddd-497e-b432-c2e26910fc20.json and https://artists.proofprofile.net/proofs/artist/bbb1d497-eddd-497e-b432-c2e26910fc20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).