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 0xea4c6fd5378e0cde15bf10eb7cdf18a2920615cc8954fc5ce78e6af130aba4c9. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbe1b074-4857-4258-b76f-44d96bdc8a41.json and https://artists.proofprofile.net/proofs/artist/fbe1b074-4857-4258-b76f-44d96bdc8a41.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Magnificat in D Major, BWV 243: I. Magnificat
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 0x184cba343d35b30ac8ca8bbf54346e1616faf0ace581694d970e4a21f8f3b3c4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBAYC8901791 — a six-check JSON result.
Magnificat in D Major, BWV 243: II. Et exultavit spiritus meus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839aaf93ac19f071425e0adbdf48d33960acbf4105564101abe47615abed0f04. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8901792 — a six-check JSON result.
Magnificat in D Major, BWV 243: III. Quia respexit humilitatem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cf477ec95802c59777d99d4d80a3feaaf0f5679cc8135a9886b4e2be2c9e3a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8901793 — a six-check JSON result.
Magnificat in D Major, BWV 243: IV. Omnes generationes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062c35a9aa4318d3e2686f498bd1795ab0c3614e63c707ddaff1a95f06ab4b0b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8901794 — a six-check JSON result.
Magnificat in D Major, BWV 243: VIII. Deposuit potentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b42f1f607eb9b7241e988d476f3e27877ecf6e24ef818e8dec380286c10b8c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8901798 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Kyrie eleison I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6124e3ff240bb12ca637fef4f0f82983dbf73b985d5a3e616849788d3825c147. 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/GBAYC8401202 — a six-check JSON result.
Selva morale e spirituale, Venetia 1640: Psalmus 111: Beatus vir (primo) a 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a68f2291f47b6ac68ce9c30a6f9973c8956ff995faf57de61556a82e6d165f. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBAYC8200354 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e067a26c98d3f3655bcbd8e1e698067ac8820f39a00c38ac1f287dfea88b85. 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/GBAYC8601755 — a six-check JSON result.
Monteverdi: Selva morale e spirituale: Beatus vir à 6, SV 268
Sanctus: Himmlische Klassik / Heavenly Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a68f2291f47b6ac68ce9c30a6f9973c8956ff995faf57de61556a82e6d165f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8200354 — a six-check JSON result.
Bach, JS: Herz und Mund und Tat und Leben, BWV 147: No. 10, Choral. "Jesus bleibet meine Freude"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f295a61830ded5ce6523fd382d7f14628b2eafc111f4eac12f3b9c0c10ea12. 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/GBAYC8702325 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Gloria in excelsis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54273d1ff3ee2c47a9d3f07ae064b09c39f46a3022fdb3df81880deaa5af0bb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401205 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Crucifixus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189bf159f2717075385fb0ba9401d890a7e4761bc8049261db3a4d7564dec89e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBAYC8401219 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Kyrie eleison II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4d87099e6280db9c2d793107dc378be3c34e099b83f1e6419f338f3a78e619. 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/GBAYC8401204 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Et in terra pax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd14a6fd0fd11a1bb36215dfff4123ecde70731bdba50c64c93148206aba860e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401206 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Gratias agimus tibi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384e961fca1989f060fde32424c7f5f99a360d028bd9efbb200dec7391acf293. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBAYC8401208 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Qui tollis peccata mundi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4913282fba368e29f48d2c8bda20ff83033b01adf770454a230112c0cbeaa5f9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBAYC8401210 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbc213d007ca40f41683880ab7a034b045b620f65467be50f6d5cbb3f26b11a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401213 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbf7c99887d410e30b94a101d0cd54188ff73d51fb2486b7e411a3747b1432b. 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/GBAYC8401215 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Patrem omnipotentem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bd6fac4da7a90ec2c6f7a6dea59bfb43a33ccb524aee22963b373d44935f57. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBAYC8401216 — a six-check JSON result.
Bach, JS: Mass in B Minor, BWV 232: Et incarnatus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bc34fd307ce46250363c8a1e4091ce8275d73efa4c4590660b85a50002ca37. 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/GBAYC8401218 — a six-check JSON result.