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 0x8ced371db228097be403d7545588a4d6bf3f8d9878b79c6d083799c2c336b810. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b68ef83f-b5b5-48f5-af1b-70901cf9116b.json and https://artists.proofprofile.net/proofs/artist/b68ef83f-b5b5-48f5-af1b-70901cf9116b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stradella: La Circe (First & Second Versions) & Other Works
Alessandro stradella: la doriclea - atto III
Alessandro Stradella: La Doriclea - Atto II
Alessandro Stradella: La Doriclea - Atto I
Giustino, RV 717, Act I: Vedro con mio diletto
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 0x9c68643b410312e16baee38f2b8cd9b2c725dd85130b7af4a6a2ac47314452d0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITDQ70230728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed5d886b4ff038c56050f1c25031ced77762e9c5de3e43f55c008af2a27511a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ITDQ70223071.
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
Bononcini: Stabat Mater & Dio e la Vergine
Al fragor di lieta tromba, Sinfonia: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f2b2e79c1323f96c2a4d6e8d358a6bcd123f8eb151525e796a3b21554753bb. 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/ITKXV1800103.
Al fragor di lieta tromba, Sinfonia: I. Allegrissimo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9536d52e3688b00f29bd6c56e63655d6483f6dd75e8e502c02601d5e6046835. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITKXV1800101.
Al fragor di lieta tromba, Sinfonia: II. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b6ae9bae7ce0ba05a1f89f008670c00c7ed2b550cb1d0d199461c44d072aa7. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ITKXV1800102.
A. Scarlatti: Oratorio per La Santissima Trinità
Stradella: O di cocito oscure deità & Lo schiavo liberato
Stradella & Steffani: Cantate sacre e profane
Alessandro Scarlatti: Il giardino d'amore & Su le sponde del Tebro
A. Scarlatti: La Giuditta (Version for 3 Voices)
La Giuditta (Version for 3 Voices), Pt. 1: Part I: Recitative: Nutrice, al fato Assiro cedo Bettulia (Giuditta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545e611e76304f56f625440253910d09d2272d135dc3792e638ee55f2d2ce521. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USB8U1086574.
La Giuditta (Version for 3 Voices), Pt. 1: Part I: Aria: Turbe timide, che fate? (Giuditta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70166b0205ab81be3d04a0d09ab2d34bcdc7e7d8683a43f4913acffbdafeed97. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USB8U1086575.
La Giuditta (Version for 3 Voices), Pt. 2: Part II: Aria: Non ti curo, o liberta (Giuditta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38679de6261a4f3f5734d014fbbb806d49c77f17ede9a396dfda62b671554893. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USB8U1086600.
La Giuditta (Version for 3 Voices), Pt. 2: Part II: Lullaby: Dormi, o fulmine di guerra (Nutrice)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e992d0be23a223c5616b12701c0ffcc5bca6dd24e44bb9e8776c1a2b54341d4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USB8U1086611.