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 0x4588bcc9ed32496a56dbb6ffb1c1f78fc224aac35ed0c55d19329d0f2f3d31ed. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60ae0c5f-8faa-49fd-89c5-0756f43b4885.json and https://artists.proofprofile.net/proofs/artist/60ae0c5f-8faa-49fd-89c5-0756f43b4885.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Stabat mater, P. 77: I. Stabat Mater dolorosa
Pergolèse & Vivaldi: Stabat Mater pour deux castrats
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 0xa39b0fea1474e1d4cf006623e3bc575e2c178e118b9b2dc7bf6e1bd9ed55ee1a. 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/FR9W12037367 — a six-check JSON result.
Stabat mater, P. 77: II. Cuius animam gementem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6e359071237b0f3176b14eb0c97a7ff115cfda0a4d3bab46bf88898f3a719f. 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/FR9W12037368 — a six-check JSON result.
Stabat mater, P. 77: III. O quam tristis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0db9c2a4977c0d9b12684fefb47c7f1a2e03f2721764b2809dd6ee4711b06a9. 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/FR9W12037369 — a six-check JSON result.
Stabat mater, P. 77: IV. Quae maerebat et dolebat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba7ae8938ea77e362e93336c1d87f33e3dc96d9f5c296ddb3687879af52a299. 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/FR9W12037370 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92270f14720afac2a23911a69a7e4198393f341e0811313bb9d80161e527c97a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR9W12037371 — a six-check JSON result.
Stabat mater, P. 77: VI. Vidit suum dulcem natum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b4c744400ceb6347871a6b06ebdefffd7d7426b564c7608a5f3e3e88efc917. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12037372 — a six-check JSON result.
Stabat mater, P. 77: VII. Eia, mater, fons amoris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c14ca9e6c614d6158e0fbf251575490fdf98be031355c151b0219f6583ffb64. 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/FR9W12037373 — a six-check JSON result.
Stabat mater, P. 77: VIII. Fac ut ardeat cor meum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca74e4e06eea1539da30be41e109d9703a2f6693e8c89eed4f9d8ad7329a8c1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR9W12037374 — a six-check JSON result.
Stabat mater, P. 77: IX. Sancta Mater, istud agas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf9fb22726b62f26b80289abaca25fddb334c16bd616fc76134fafa28dba63a. 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/FR9W12037375 — a six-check JSON result.
Stabat mater, P. 77: X. Fac, ut portem Christi mortem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f102ae0e11ae65b1794a4e0ad628e7180bb90a9e2a08e652383072b72b63c2. 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/FR9W12037376 — a six-check JSON result.
Stabat mater, P. 77: XI. Inflammatus et accensus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f92f53a64578847c6e5334bfab1845547b38fa4d1fb7174420e89ada8746202. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR9W12037377 — a six-check JSON result.
Stabat mater, P. 77: XII. Quando corpus morietur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25cfbb32f12860af6a73d9fcd6a87a702b1938f6a7137d5ea7ab273e5d6928b. 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/FR9W12037378 — a six-check JSON result.
In furore iustissimae irae, RV 626: I. Aria. In furore iustissimae irae (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85e19dd76d2bbf051e242823956491de38cc1c4eba3b85555a0d40f43c6ba19. 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/FR9W12037360 — a six-check JSON result.
In furore iustissimae irae, RV 626: II. Recitativo. Miserationum Pater piisime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090ca5c104d7064f56c8a659cb2b75a51c41b03be99489d9a4d76da4c4ab8913. 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/FR9W12037361 — a six-check JSON result.
In furore iustissimae irae, RV 626: III. Aria. Tunc meus fletus (Largo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe985e2d35996ec94d5e8b5dcc3dbaf88eb9093d360c9b8719323db2c9572d077. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/FR9W12037362 — a six-check JSON result.
In furore iustissimae irae, RV 626: IV. Alleluia (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dcfea71b8a36fa7b9b9e54cd4a7fdd3f137620ff8fc459639c14b07d9fe04f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12037363 — a six-check JSON result.
Concerto for Violin, Oboe and Organ in C major, RV 554a: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f09597d6e82ae4e2370d24c587eb4bd9ec06df85841d602bcc12184cdb4d06. 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/FR9W12037364 — a six-check JSON result.
Concerto for Violin, Oboe and Organ in C major, RV 554a: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e87123aa07a5e7431a0ed6dea6503b5c63bd93c982b39bf964d13d45c233b07. 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/FR9W12037365 — a six-check JSON result.