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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b144561610f658e18334fb72174b83d1ed991b4bb362e3f5c53f97c9bec653. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45aaf077-8781-4552-87b1-9d23ad045866.json and https://artists.proofprofile.net/proofs/artist/45aaf077-8781-4552-87b1-9d23ad045866.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 11 in A Minor: I. Largo
Valentini: Concerti grossi, Op. 7 (Alpha Collection)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5d203d3beea9ffdc6091deb398c36970acb295cb56da869b2310ac84a75ffd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70100330.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 11 in A Minor: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dacd7d21e7cb6844bd7c863bac805633943e473c8b0568ab832c73ba189cfb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101420.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 11 in A Minor: IV. Allegro e solo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95105e8dd9e4496aba904e349a6c8d7cdfd1e5ebf16065c366396a708dcc8498. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101190.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 11 in A Minor: VI. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166717abc2d25bbdf15ce4a26a9bf2e7da18e8c38019f744587e82e3e8377cdd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101210.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 11 in A Minor: VII. Allegro Assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0410873ea5bcffdd1efc65ebaff89d704590b36255defd77b52ced58248414. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101220.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 7 in G Major: II. Fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f7e6670e0fb94c2cc8e4b825f64f5410748afdf579c651144554c5ccb05658. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101230.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 7 in G Major: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc951cee009b5154e1e8fdab12f20566e23303106f32d8a7c39c1d6f2872407c9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101240.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 7 in G Major: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cbdd60db918bbad0f1a35c6c45fbfe80d7f8ae7fb8e0e09868802564c05b5a. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101270.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 11 in A Minor: III. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185838fd29a9ebefd88e4371196f57d8a1a968d1ccc2394c2fb876c1262eeefb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101180.
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
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 11 in A Minor: V. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccfecd4358783fd0af56b422436490c2c01b147f37f1419a07cfd9aefaf06c3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101200.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 7 in G Major: I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353af9ec46a723af6df62198aaf62dd0bdee0ca2c0b4e19a6e69287086d86044. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70100340.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro secondo, Concerto No. 7 in G Major: V. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cdfe4fb7038a8eb9d2bea1e883d8a4303f6397fa1728a065307568d449a58a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101260.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro primo, Concerto No. 2 in D Minor: I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad0ea4997d8f097f99536f1221cd92ca9a2229775d61b4220315c367cc77c8d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70100350.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro primo, Concerto No. 2 in D Minor: II. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c541ee7bb0fa388835d0e6634d487dd5e0affa75b91a518f90d89aa827c8ca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101250.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro primo, Concerto No. 2 in D Minor: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc938c3d3c42e7e997d9ef0a7e74aff144a9b9c65886a6bddc8474e90d49299bc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101280.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro primo, Concerto No. 2 in D Minor: IV. Adagio e staccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b05e22a808f6b416dcce48f593b95e2b3bdd4fe63178524d117f2f0d40674cb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101290.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro primo, Concerto No. 2 in D Minor: V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd8d9bbfc687ba43a9b90a9c3e12875391f648c8291b8bb819f621e1d3c646. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70101300.
Concerti grossi a quatro e sei strumenti, Op. 7, Libro primo, Concerto No. 1 in A Major: I. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038e32bc88c363d5677f92e4da707939d8308aa05ba99fcd8151dce871cb2219. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70100370.