The Dover Quartet is an American string quartet. It was formed at the Curtis Institute of Music in 2008 and its members are graduates of both the Curtis Institute of Music and the Rice University Shep
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fed466d3b0c784ff53f0d85aafaf8f8bd7424506f86d0e3697d257c0eae5a45. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d85866d-81c4-4f54-94ca-caa08a24b04e.json and https://artists.proofprofile.net/proofs/artist/1d85866d-81c4-4f54-94ca-caa08a24b04e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Antonín Dvořák: String Quartet No. 12 in F Major, Op. 96/B. 179 "American"
Dvořák: String Quartet No.12 In F Major, Op.96, B.179 "American": 4. Finale (Vivace ma non troppo)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da1d48bece2cc255bcb9add333e4c127b1950010e0dd4e64e8be97ba723cdcb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEP2164151.
Mendelssohn: String Quartet No.2 In A Minor, Op.13, MWV R22: 1. Adagio Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1515ebe452c6e5d7559689ac577122015671ae985e9c6d055af1e363144201c2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEP2164152.
Shostakovich: String Quartet No.8 In C Minor, Op.110: 2. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e0fa83562c01d16b7f37e036e8b7cd1cf4697bfaa52968af7965bf6d26de34. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZMEP2164156.
Vivaldi: The Four Seasons, Summer: 3. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b3f857f770cd339be657607d08f5c2cbecca7cf5f581958e59da1a128995ab. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZMEP2164157.
Sonata for Clarinet and Piano: I. Grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f8e8bb6ff5f4bfa4a94294e7374fde962dd330cc491440223d8d7a16ebf7dc. 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/US23A1587444.