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 0xdba344ca27f740829fd96d96c1f306f776525f1db56d1a3a51a3a218d140ba99. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b9af8ec-e352-44f6-8391-68c92826760e.json and https://artists.proofprofile.net/proofs/artist/6b9af8ec-e352-44f6-8391-68c92826760e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kerll: Works for Organ - Schmelzer: Sonatae unarum fidium
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. 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 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.