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 0x4f4bec4ba5bb2dc0f68a7fdc03d822c9f07245c2c1768bc33b4646132b811218. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/179acff6-59e9-4a77-b0c2-b10bc93b4250.json and https://artists.proofprofile.net/proofs/artist/179acff6-59e9-4a77-b0c2-b10bc93b4250.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Stabat Mater in F Minor, G. 532: I. Stabat Mater dolorosa. Grave assai
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 0xcb6aa28625256f761c507c4ac6e562bf882422b04c4796429b19274217d1bce6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEX991891301 — a six-check JSON result.
Stabat Mater in F Minor, G. 532: II. Cujus animam gementem. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc583176c50a15bd7ab12110799d4ff0221d948a4a2bb604ecc9abaeba6d40afd. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DEX991891302 — a six-check JSON result.
Stabat Mater in F Minor, G. 532: III. Quae moerebat et dolebat. Allegretto con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb33b943696452e8f15b52ea5293f06194b968224dd7c06fdc72c2c7a136170f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEX991891303 — a six-check JSON result.
Stabat Mater in F Minor, G. 532: IV. Quis est homo. Adagio assai - Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f430f59b1b513e5a0c97cd18e7a8d01a0b2bac76d4c3e755ca345a865611a7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEX991891304 — a six-check JSON result.
Stabat Mater in F Minor, G. 532: V. Pro peccatis suae gentis. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930535860247740089aa0c1a05152f39d91572c4a874346b036f166d4b2ae5ca. 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/DEX991891305 — a six-check JSON result.
Stabat Mater in F Minor, G. 532: VI. Eja mater, fons amoris. Larghetto non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3eec393b965b1d4a5d3f6e8ff0c2d280480e47e69c5e55e0bbc0f863f9a4d4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEX991891306 — a six-check JSON result.
Stabat Mater in F Minor, G. 532: VII. Tui nati vulnerati. Allegro vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74a717cf391257c110ede8295f45712925602334303331b7e1d18d045380e0c. 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/DEX991891307 — a six-check JSON result.
Stabat Mater in F Minor, G. 532: VIII. Virgo virginum praeclara. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d226b643836f290b69c6a3ada2a6206a7ef4845c0ef65d1fd1f2925a76960d5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEX991891308 — a six-check JSON result.
Stabat Mater in F Minor, G. 532: IX. Fac ut portem Christi mortem. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24ec05e18a1f7df44c2769f2041a3d2da975f6f12fdaa5dc5d67ddaa0831cf5. 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/DEX991891309 — a six-check JSON result.
Stabat Mater in F Minor, G. 532: X. Fac me plagis vulnerari. Allegro commodo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c45c74964942d8b0ed44b9b7b01f62b459783d02931ad2774b6d0cb2ffaa5d8. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEX991891310 — a six-check JSON result.
Stabat Mater in F Minor, G. 532: XI. Quando corpus moriretur. Andante lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a14cb8f4326d786b84cb27cc94bfa72e2eb338ed05eba26663918344da4f77. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEX991891311 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d0ec25a707f666e4d3b7953cf840b2f948da197ef5d41a61f4e073d39dd282. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEX991891312 — a six-check JSON result.
Sinfonia in D Major, G. 500: III. Menuetto primo - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba718bea4500bde7e14a5f822911fd3a18df4ac8c72a2c267c15333b672a7c4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEX991891314 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcda39563cbd962e9facf100272163b9d049f7ca1a6433fd75566406375a1685. 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/DEX991891315 — a six-check JSON result.