The Sacconi Quartet is a UK-based classical music string quartet founded in 2001 by four graduates of the Royal College of Music, London, UK. The Quartet has achieved widespread recognition, having gi
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 0xce343bee61c2e5c7e3fa71d036ca31bfdbaeada0ebb4c75305f7b1ef7568a2e1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e1984cf-974e-48df-ad3a-1668a7d201c6.json and https://artists.proofprofile.net/proofs/artist/5e1984cf-974e-48df-ad3a-1668a7d201c6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
String Quartets By Ravel, Lalo and Turina
Dvořák, Smetana and Suk: String Quartets
Beethoven: String Quartets, Op. 18, Vol. 1
Beethoven and Mendelssohn: String Quartets
Schubert: String Quartet in D Minor, D. 810 "Death and the Maiden" - Beethoven: String Quartet in C-Sharp Minor, Op. 131
On the streets and in the sky: I. Driving
On the streets and in the sky (Works by Jonathan Dove)
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 0xa145da22fe0c9918e6784f01e2ea64c12e2c29ecbfcdcbfa4cde1f57955e33b5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2579301 — a six-check JSON result.
On the streets and in the sky: II. Lively
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dde1ff4b9b930e4057679e4d2859e5c4b0008639327678e120ff1bd7c6fe80. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2579302 — a six-check JSON result.
On the streets and in the sky: III. Very Gently Moving
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d3516b758a5b820dd8a6deed3bd9595f579bc46501d1fdec3d4e5fc611bda4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2579303 — a six-check JSON result.
Who Wrote the Book of Love?: I. Poet Love (1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe50a6b15828dc1ddec5d1234e6fdbb9a09a88f86e1c9d831fa86df1e75c275. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2579308 — a six-check JSON result.