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 0x9e3ae6e0bc9126d4f58cdfc4af23941f772e9e0631af748eff352202fda8e3a4. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f36969b6-0963-4bb0-83af-1e9738f8d680.json and https://artists.proofprofile.net/proofs/artist/f36969b6-0963-4bb0-83af-1e9738f8d680.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
In turbato mare irato, RV 627: I. In turbato mare irato
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 0x1352d011757d3f06bbbabfc1d0c18518dd5f23673e250c8534ab062386948320. 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/DEE861802397 — a six-check JSON result.
In turbato mare irato, RV 627: II. Splende serena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0920d8bd68aa8c5d09065d41f7673220048f33585435d048e6bef13287c6bd. 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/DEE861802398 — a six-check JSON result.
In turbato mare irato, RV 627: III. Resplende bella divina stella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46aa755c7b179d6014380cf4029b32300ddcdadfac37ee606bf445576df404a. 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/DEE861802399 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6208492b0c938e3a35b6fda2d7e66b669b3f0699888ce60acd26b90716eda395. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEE861802402 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b23c0827de4867dde1b0ef34615e0c9657fb089649e59d6053a0ebfbe13775. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEE861802404 — a six-check JSON result.
Nisi Dominus, RV 608: I. Nisi Dominus (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe03370b7a3fc2f96aa9f2db77e4498b31b09db3223b9cb9ec4d4913ab7b5db. 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/DEE861802406 — a six-check JSON result.
Nisi Dominus, RV 608: II. Vanum est vobis (Largo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092cba75a09947fed10d38733c116d3e1ae10aa6d9ddd61d377404e398a70121. 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/DEE861802407 — a six-check JSON result.
Nisi Dominus, RV 608: III. Surgite (Presto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f43e4aba58bc889a742e26be60b197f78faae3883b7f768e7b4c54954c2df4d. 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/DEE861802408 — a six-check JSON result.
Nisi Dominus, RV 608: IV. Cum dederit (Andante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c49ea1caea0f86fc9f17c1ee75343e8bbbde9236eaa2f12d8c09c9ba0cc66b3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEE861802409 — a six-check JSON result.
Nisi Dominus, RV 608: VII. Gloria Patri (Larghetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c65cf9257e44cb28de9d0a5da61a2a535227f31f356c2a79ad0ea4f55eb3c9. 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/DEE861802412 — a six-check JSON result.
Nisi Dominus, RV 608: VIII. Sicut erat in principio (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d4cf51064ac264ec8c9fb2b7a1570eba78e93ec4d40d135581ff04536189ce. 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/DEE861802413 — a six-check JSON result.
Nisi Dominus, RV 608: IX. Amen (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd88c9639555bae6aee2e0c07ca79446f57bc7a5bbd7b61e70d81c80642dee73. 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/DEE861802414 — a six-check JSON result.
Credo in E Minor, RV 591: I. Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e5af124a069b95473a86f9036db31106debbce69a6c4e68ab0a4bc22ce73b3. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DEE861802416 — a six-check JSON result.
Credo in E Minor, RV 591: II. Et incarnatus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40f8f7d1529841345ae6fc639676585b62c0e0ff71afaf9617ec13bef1e0d18. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEE861802417 — a six-check JSON result.