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 0x6886c735d7907acffc0dc6e4f3fb739f160f12de88a602880672347a1cfcc78a. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/317f29cf-5776-4f65-9493-0263bf13b35f.json and https://artists.proofprofile.net/proofs/artist/317f29cf-5776-4f65-9493-0263bf13b35f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Bach: Wie schön leuchtet der Morgenstern - BWV 1,8,92,101,107,114,123,133,139
Wie schön leuchtet der Morgenstern, BWV 1: I. Wie schön leuchtet der Morgenstern (Chorus)
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 0x08374715febd010cdb910056ca6f20642259435b8d98fe9f16709f3cbdc4036f. 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/DEE472400093 — a six-check JSON result.
Wie schön leuchtet der Morgenstern, BWV 1: II. Du wahrer Gottes und Marien Sohn (Recitative)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1337d24f45d9632c2b7151889421d29c5cc44cbdd3f9fb6f617ae932addcba. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEE472400094 — a six-check JSON result.
Wie schön leuchtet der Morgenstern, BWV 1: III. Erfüllet, ihr himmlischen göttlichen Flammen (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea262cecb5b84fca269953ce39ae3854c2e08cbae1729cd7ee33713bc6d02ef. 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/DEE472400095 — a six-check JSON result.
Wie schön leuchtet der Morgenstern, BWV 1: V. Unser Mund und Ton der Saiten (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cf14b5faced504e5e8edf5376084081d95a0186093fbb2474e6f3fb85dc6d6. 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/DEE472400097 — a six-check JSON result.
Wie schön leuchtet der Morgenstern, BWV 1: VI. Wie bin ich doch so herzlich froh (Choral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66a67f62d851b8c80826c0725e47e6818559bb6af016edddd652f2b12d8cb50. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEE472400098 — a six-check JSON result.
Was willst du dich betrüben, BWV 107: I. Was willst du dich betrüben (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023174188ffd912c6b5e48a6dcc9caff67f7a290de174b0f8a7b33fe6ea875ca. 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/DEE472400100 — a six-check JSON result.
Was willst du dich betrüben, BWV 107: II. Denn Gott verlässet keinen (Recitative)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae65516662b2118432ec9b6a3e80c5551734fa614bbb92a41a6f14ed28775d0. 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/DEE472400101 — a six-check JSON result.
Was willst du dich betrüben, BWV 107: III. Auf ihn magst du es wagen (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746a668a0763fdd93f72de7fe8e3c017b533fda8116fd7d12f029bad3356361d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEE472400102 — a six-check JSON result.
Was willst du dich betrüben, BWV 107: IV. Wenn auch gleich aus der Höllen (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8062294b47b3a23f03da2252f1463e7bf86017f0592fa0bc89aac0820903f0. 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/DEE472400103 — a six-check JSON result.
Was willst du dich betrüben, BWV 107: V. Er richt's zu seinen Ehren (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca504de8541dd77ca2cbdab8d26be7e6f559823079ad1250e9896df0534be061. 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/DEE472400104 — a six-check JSON result.
VI. Wie bin ich doch so herzlich froh (Choral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18545e20c6031b1754e6fb0f1f2d30eab99e59e1cc80b2b7b7fd535d6f202263. 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/BER182446701 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2877360f8c7402bd8d1bbc8a07888257e13d41b8e27bdc83e780ba94e7427f52. 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/BER182446706 — a six-check JSON result.
Historia der Geburth Jesu Christi, SWV 435: Fürchtet euch nicht (Der Engel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ba3bf55df372fc7d12090ce17fc44bb38b93277f6afdc4bcb852aa31b71aff. 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/BER182446710 — a six-check JSON result.
Historia der Geburth Jesu Christi, SWV 435: Stehe auf, Joseph [I] (Der Engel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d186eda77706a66109f27eef3a834a1e02051f1fb440eed8f8760bcd22fe78. 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/BER182446722 — a six-check JSON result.
Historia der Geburth Jesu Christi, SWV 435: Stehe auf, Joseph [II] (Der Engel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a858f7628dd0aec192abdc113ce86aed6866e1c375fad10fe1f09e72b95fbb. 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/BER182446724 — a six-check JSON result.