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 0x60e3a1e96538680a4e0b63ed69ee087298f6986f39b750e4f9cf2a034184baba. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c239be3-f734-40e6-b716-d3ddb743b328.json and https://artists.proofprofile.net/proofs/artist/1c239be3-f734-40e6-b716-d3ddb743b328.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Membra Jesu Nostri, BuxWV 75, Ad pedes: Concerto "Ecce super montes pedes evangelizantis"
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 0x15ebb3099befdc4d849d7099a9a729ee192ee230ef3cd49ddef7435c947ad619. 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/FRU621944402 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad pedes: Aria "Clavos pedum, plagas duras"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e3496d5b6eab04c24a8fe36c11106ded6fc636372b90edec0950ae9dbd4706. 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/FRU621944404 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75: Concerto [Ad pedes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fee2d34b36d9219a3d734133c27dabab0943cb9d0d0b0af8b74518e34221ba. 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/FRU621944406 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad pedes: Salve mundi salutare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899692aba446bb35f755a4f50d7642ad57afdfc90c3a99687cb916b67c951ec7. 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/FRU621944407 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad genua: Concerto Ad ubera portabimini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a555f4ad7b292e65cf0ef88f59aefa581ac5af5ba7085aeba5a844f69991108. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRU621944409 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad genua: Aria "Ut te quaeram mente pura"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a29bc9e8bd09d1b16d23dd45a72385a716eb68929eebd391d4c24920174b987. 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/FRU621944412 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75: Concerto [Ad genua]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bec692a864cf52e19c98d2f827be2dc42c412a6283cadd1e1ca418221974a5. 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/FRU621944413 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad manus: Concerto "Quid sunt plagae istae in medio manuum tuarum?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7fe731c02c724ce14d93c2d2062211113f797f519d367d7e8f5b8f5ddea272. 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/FRU621944415 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad faciem: Concerto "Amen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b0900a45d7e1f0df85b87762f6f78d49b5372729bfc002ae566ad0ee3c6436. 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/FRU621944443 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad manus: Aria "Manus sanctae, vos amplector"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4ae79a32e767ca98606a691a27b7dfcd5fd1db2a40421728a336f01ff20064. 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/FRU621944417 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75: Concerto [Ad manus]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebaf3e060aedaef8e9ea18287a8c51ab5d95c3c7ad2b161d9fae9b9f34f7267. 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/FRU621944419 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad latus: Concerto "Surge, amica mea"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eafb805891028277e9f6f09a436321c91d24fc329c79ab90d2247af4741cd0e. 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/FRU621944421 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad cor: Concerto a 3 voci "Vulnerasti cor meum"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb19c024baa1415c2b745ad8cf5d78920e5bd47dc6fe614a2ef070462922efbd. 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/FRU621944433 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad latus: Aria "Hora mortis meus flatus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcfc9ba1f9d709fee1bc41909a43bbcb1956f81e15d4b9e5bab58825eb0bda2. 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/FRU621944424 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75: Concerto [Ad latus]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd46df053aa341c03f4c65f1a7a47322ff925f33f11518c905da59261aed38f. 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/FRU621944425 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75: Concerto a 3 voci [Ad cor]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ae9b5072ce57e6ba6b6cd56733e602fc54afa4a6ef403f37b4f34b6de5a6ec. 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/FRU621944437 — a six-check JSON result.
Membra Jesu Nostri, BuxWV 75, Ad faciem: Concerto "Illustra faciem tuam"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1223b6e02d26d113cdd1785cf8715fe125193fd54c2718fc0f6aa78d20510bf. 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/FRU621944439 — a six-check JSON result.
Gott Hilf Mir, BuxWV 34: Concerto Fürchte dich nicht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6398831fb38508d25e09f863a2c70a89c035f65046bc63cb058bfc1aad06dae8. 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/FRU621944446 — a six-check JSON result.
Gott Hilf Mir, BuxWV 34: Choral "Wer hofft in Gott"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787f38ed7c1efe019512d3528ba26d9616d05486452ae5538d059f6195fd5dfd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRU621944448 — a six-check JSON result.
Gott Hilf Mir, BuxWV 34: Aria "Ach ja, mein Gott, ich hoff auf dich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf878d5179121fe552a58be5990e158c83baf5995a4efb7c3022a58a1436eb87. 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/FRU621944449 — a six-check JSON result.