thumb|right|300px|Ars Nova Singers The Ars Nova Singers is a choral ensemble based in Boulder, Colorado. Founded in 1986, Ars Nova Singers is composed of about 40 singers who were selected through au
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 0x5038a2035fcef100c49ceea7b312746b8bbf3677eab2acd20bf1cf7576bdd4a5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e27dd073-9705-42b3-a667-10156ae12a78.json and https://artists.proofprofile.net/proofs/artist/e27dd073-9705-42b3-a667-10156ae12a78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Soundscapes: Music from Colorado and Beyond