Dalla was a band specialising in traditional Cornish music who were active from the late 1990s until about 2017. They were known mainly for their festival and concert performances, but until about 201
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 0xb15aa442075274dd5addb3718a054828024471dff5af6360e534aa08d7a3fc46. 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/384f47f9-0921-4762-856f-47c0e3d9371d.json and https://artists.proofprofile.net/proofs/artist/384f47f9-0921-4762-856f-47c0e3d9371d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).