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 0xf0fe75b62b91dcc140394384d1f6b0e8619c2ec927288395f6748fc7e9d5612c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c47a4d2a-935a-4dd7-a688-2f129a728357.json and https://artists.proofprofile.net/proofs/artist/c47a4d2a-935a-4dd7-a688-2f129a728357.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lully: Phaeton - Atys - Armede (Ouvertures avec tous Les Airs)
Francesco Geminiani: 9 Trio Sonatas - Arranged after the Violin Sonatas Op. 1 for Orchestra | Capriccio Barockorchester. Dominik Kiefer
Mozart, Martini & Sterkel: Piano Concertos
Stradella & Gregori: Sinfonias & Concerti grossi
Sammartini: 6 Concerti grossi, Op. 5 & Other Works
Bassoon Concerto in A Minor: I. Allegro con spirito
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 0x1bafa506320fb4808ef9f02ee2403621905b8cd3975240a70bd62fee25f8321d. 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/CH0041100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18cb4d4465a17e76246490b31bf6d2f1d08208ba175beeb08c42f15b624cf7f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH0041100300.
Bassoon Concerto in A Minor: III. Allegro di molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf024cb55426e6df5c7d6436040cf24f1355b1c41700739d8c1690ecea62bee9f. 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/CH0041100310.
William Hayes: Concertos, Overture & Sinfonia · Capriccio Barockorchester / Dominik Kiefer
La magie de l'Avent - Musique féérique pour Noël
Vesperae solennes de Confessore, KV 339: Laudate Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a5a366eed04fed92fc2e61b9cff7ae2d108fd49fab914a08b20f8b700b5326. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CH0041402700.
Dans une étable obscure: (Es ist ein Ros entsprungen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fb1ecd3a37ee23fa0d0876c124f71537640844abca2353a1ce4d012ae94eb3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH0041901512.