thumb|Nýdönsk after a concert in September 2018.Nýdönsk (alternatively Ný dønsk or Ný dönsk, literally New Danish) is an Icelandic musical group established in 1987Tonlist.is: Nýdönsk biography by Dan
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 0xaac8ae43cc36026593b83aeab781a1a8c35f2fa0f96e78197c7036ab970469f0. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47f2ef25-5574-4d3f-a33a-d0fce69cc35c.json and https://artists.proofprofile.net/proofs/artist/47f2ef25-5574-4d3f-a33a-d0fce69cc35c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).