thumb|right|Official logo of the London Symphony Chorus The London Symphony Chorus (abbreviated to LSC) is a large symphonic concert choir based in London, UK, consisting of over 150 amateur singers,
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 0x5dc204269c820c009478a58aa02e80a65f7e98db90696efe23823a530a0a643d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/887f0f6b-2cf3-4dfe-b596-4deed47db1d8.json and https://artists.proofprofile.net/proofs/artist/887f0f6b-2cf3-4dfe-b596-4deed47db1d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Requiem in D Minor, K. 626: VIII. Lacrimosa
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 0x2a298ca23ed68c17f91705770225303153730b91d3f9003f3e0e4a81cbb7e05a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC8900212.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. (c) Allegro assai. "Freude, Freude!" -
Beethoven: Symphonies Nos. 8 & 9 "Choral" (Remastered 2025)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215bb15eb541d243f7a42dc8e8a264a9704d78a79f16e9f752c22c5823bf8104. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC2401071.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. (d) Allegro assai vivace. Alla marcia. "Froh, froh, wie seine Sonnen fliegen" -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be5330e143b65d03e7cc4a2ea52cf59e814be22a7342808b73141e92f77f03e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC2401072.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. (e) Andante maestoso. "Seid umschlungen, Millionen!" -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0bb18d6fd50773e76d414d303eb5654fe96e073576eaa53661732878d442f9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2401073.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. (f) Allegro energico, sempre ben marcato. "Freude, schöne Götterfunken" -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cad095d3d0075253ccf46ecf3b3dc263ebc71f70d149bcf6f16ff974d225500. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2401074.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. (g) Allegro ma non tanto. "Freude, Tochter aus Elysium!" -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63453433bd64fdf9629402b56da4b82ebf43cefadefdd08292013d98426cac5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC2401075.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. (h) Prestissimo. "Seid umschlungen, Millionen!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407a551a0eee3389e5bd7c9e4447080f390940b6ce0a816087d25d4347b5775d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2401076.