The Calidore String Quartet is an internationally performing classical music string quartet based in New York City. The Calidore is composed of violinists Jeffrey Myers and Ryan Meehan, violist Jeremy
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 0xff84ad977c1428a8a594ddba8a623ab16bc71f11df27d185cd94c4f04e4ac652. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/689a5942-9eec-41b2-8fd3-bf4fd008397d.json and https://artists.proofprofile.net/proofs/artist/689a5942-9eec-41b2-8fd3-bf4fd008397d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Haydn: String Quartet Op. 76, No. 3, "Emperor" - Mendelssohn: String Quartet No. 2 Op. 13
Serenade (The Musicians & The Great War 2)
Music@Menlo Live, Russian Reflections, Vol. 3
Resilience: String Quartets by Prokofiev, Janáček, Golijov and Mendelssohn
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18535bc6b0a5ee80ac58b295254de870170a9de3e706c51e624f0ab8fdb887eb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH1855108.
Music@Menlo Live: Creative Capitals, Vol. 5
Music@Menlo Live, Haydn Connections, Vol. 3