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 0xda98a4f746f0816d0a84235a28bf247f76e2fa050bd69825f1b604e7b50df7eb. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09a02d72-48d8-4f8b-af7a-f36669ad33ce.json and https://artists.proofprofile.net/proofs/artist/09a02d72-48d8-4f8b-af7a-f36669ad33ce.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Let the Bright Seraphim (From "Samson, HWV 57")
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 0x4672393041e159d375d99686954dc02d7974c9a173a76113f793c09a9b92b67f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19000446 — a six-check JSON result.
Eternal Source of Light Divine (From "Ode for the Birthday of Queen Anne, HWV 74")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ad20574da50fc052d5768848b9974a770ff69f31efe3e807daab815861784b. 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/USSM10013856 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4672393041e159d375d99686954dc02d7974c9a173a76113f793c09a9b92b67f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM19000446 — a six-check JSON result.
7 Arie con Tromba Sola: No. 1, Si suoni la tromba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187ad685ebaf0667247af497ce8bf561249963f23534da77dd31308b3d015db9. 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/USSM10013844 — a six-check JSON result.
7 Arie con Tromba Sola: No. 4, Rompe sprezza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65fc9b1bc1bff868b6f62a02044a13213ca2f02856c93c5173c0a9ebb5c20a5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSM10013846 — a six-check JSON result.
7 Arie con Tromba Sola: No. 6. Mio tesoro per te moro (Aria in forma di Menuet alla Francese)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b5c80dd44dc23df8f6c4ea442998cd76bebeb354c7c31ff6a4d71bd16a606d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USSM10013847 — a six-check JSON result.
Su le sponde del Tebro - Cantata a voce sola con Violini e Tromba: 6. *Aria. (Poco mosso, sempre dolce e leggiero) - Ritornello*
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f70d8f8d04e2875d7741f68705f66d0e1108c551936a53974616bb77ea0179. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSM10013853 — a six-check JSON result.
Sinfonia avanti il Barcheggio in D Major for Trumpet, Strings and Continuo: 1. Spiritosa, e staccata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad9ded8306ad4594a4c2bfb3e3eeb060f957c53f56d735304747c040e003620. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USSM10013858 — a six-check JSON result.
Sinfonia avanti il Barcheggio in D Major for Trumpet, Strings and Continuo: 2. [Allegretto - Corrente]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc43c738ecc8f07c36adc186e3daed5d68dbc74c073dfedecce3a57aa886744. 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/USSM10013859 — a six-check JSON result.
Sinfonia avanti il Barcheggio in D Major for Trumpet, Strings and Continuo: 3. Canzone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537808be4d872cd0142362dd078d2c3f7d36ec0862b92a729112f963f03c1a11. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10013860 — a six-check JSON result.
Sinfonia avanti il Barcheggio in D Major for Trumpet, Strings and Continuo: 4. [Allegro]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb71e88ac72ef650536a438182411a2346afe0be891236b65ed4d0b204ef5563. 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/USSM10013861 — a six-check JSON result.
Aria. Seufzer, Tränen, Kummer, Not (From Cantata No. 21 "Ich hatte viel Bekümmernis", BWV 21)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec182a759dac72a991e4ca80a558a36c367693246c8cb8e514c8b3a926ebbf0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USSM10013862 — a six-check JSON result.
Cantata No. 51 "Jauchzet Gott in allen Landen", BWV 51: 1. Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf7ccc29d9e4f135e4481d30b069b5a9206d479a1d462335df659dcdbe99577. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USSM10013864 — a six-check JSON result.
Cantata No. 51 "Jauchzet Gott in allen Landen", BWV 51: 4. Choral - Alleluja
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db61ecd209cd5b18e20622c87a7c5345aeb65046b5e2d2d6efb18ad6801d2a2. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USSM10013865 — a six-check JSON result.