The Del Sol Quartet is a string quartet based in San Francisco, California that was founded in 1992 by violist Charlton Lee. Del Sol has commissioned and premiered thousands of works from a diverse r
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 0x30c35b06dccb2c93d17d05dfe151a1389a339edbb291261fe080d7e4942375e6. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1290f44e-bd2f-402c-8131-e9974eb9419a.json and https://artists.proofprofile.net/proofs/artist/1290f44e-bd2f-402c-8131-e9974eb9419a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lisa Mezzacappa: The Electronic Lover, Episode 6 "Cyberwedding"