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 0x76b6494e7326dd06caec6e27a60c506d1a8af488241e19b66b8c6c5f24365cba. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c08a8820-9d8c-455a-b942-9a8f92341f02.json and https://artists.proofprofile.net/proofs/artist/c08a8820-9d8c-455a-b942-9a8f92341f02.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto Grosso in G Minor, Op. 6, No. 8 “Fatto per la notte di Natale”: I. Vivace - Grave
Corelli: Six Concerti Grossi, Op. 6 "Christmas Concerto"
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 0x6ca25a85a2a62331436f476b3008a4f9fda1b566ff333e7d13cc264664ec187e. 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/USHM91995887.
Concerto Grosso in G Minor, Op. 6, No. 8 “Fatto per la notte di Natale”: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ad4313c94b8098f0829662674bcd5559b6e3101285714d6973fb9abaf5e0a3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USHM91995888.
Concerto Grosso in G Minor, Op. 6, No. 8 “Fatto per la notte di Natale”: III. Adagio - Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74455f6512d84e7e96dfa1cb3751ed44778c07da4a0b687ec1addd1f22f233b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91995889.
Concerto Grosso in G Minor, Op. 6, No. 8 “Fatto per la notte di Natale”: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf41dba2beb5d9449faca81df4abafd436a2ca91275def4b186cb73d105fcaba. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USHM91995890.
Concerto Grosso in G Minor, Op. 6, No. 8 “Fatto per la notte di Natale”: V. Allegro - Largo (Pastorale ad libitum)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0af60f55b32b887045fe0501a915d0a622672d05ad25559fcc51367726828ff. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91995891.
Concerto Grosso in C Minor, Op. 6, No. 3: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e1ac9bcae9dd66e506ea1cb805b9df116ddd23cca959ee2de153bc142d55f2. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91995892.
Concerto Grosso in C Minor, Op. 6, No. 3: II. Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2813be312bee2783a22a525b32dfe488f6172b855465d57ebcaea724d573ba5d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91995893.
Concerto Grosso in C Minor, Op. 6, No. 3: III. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e55e7b07b7ad442e42392fdaa8966466a5b90f7f6ce638bd5a2cb9f518f880e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM91995894.
Concerto Grosso in C Minor, Op. 6, No. 3: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b99c8f590f72a7c955e7bba24371a97646a2f002fa009060493d2ea293c4dc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM91995895.
Concerto Grosso in C Minor, Op. 6, No. 3: V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ec746dba83b63f29ea04488860741de243f8f4f86ce298c7a97ed210a1ed86. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM91995896.
Concerto Grosso in F Major, Op. 6, No. 12: I. Preludio: Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd97263f4e62badac2004dbc288f87698814c2b4626ed3dca8e860eba518e01. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91995897.
Concerto Grosso in F Major, Op. 6, No. 12: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0220cbbc7bbc31ff1f0179e21eef9835c8491abea240f54768f761ab3ccaa3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM91995898.
Concerto Grosso in F Major, Op. 6, No. 12: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf217bfef50a8a20706e683121d4f3eda01b3a81edaf5bb203f5a63b6a7b0bf4f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM91995899.
Concerto Grosso in F Major, Op. 6, No. 12: V. Giga: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96336c007c2fa53f3391a2d6a393cb8c539001b1fd82e528055f6b936ed3ad86. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91995901.
Concerto Grosso in D Major, Op. 6, No. 4: I. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9eac8017c21354e3288ee988568f804f1aef04bf349871fb7a0ddd4e37656b4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM91995902.
Concerto Grosso in D Major, Op. 6, No. 4: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafd4d8748de1f61f227c4a04973208da24a19acbf55f76c59c9eada62e0cb4c. 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/USHM91995903.
Concerto Grosso in D Major, Op. 6, No. 4: III. Vivace - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a663cc444a4a6c34439dd1dc4dd7ccd7930601d897ac8bf55dc4d629072fcbe. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91995904.
Concerto Grosso in D Major, Op. 6, No. 7: I. Vivace - Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cbd1b18394c1b540bdd1574f5ab81daab2645937ce648457308416e7050bfb. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM91995905.