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 0x0b0f82a1606322a66577d45e65d0e2a8e7506ee11f2e4bdd4d014c651853f7e5. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dd596b5-c818-4973-a6ff-4c6ab39f509c.json and https://artists.proofprofile.net/proofs/artist/2dd596b5-c818-4973-a6ff-4c6ab39f509c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Concerto grosso in G Minor, Op. 6, No. 8 "fatto per la notte di Natale": III. Adagio - Allegro - Adagio
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 0xeaf7120a7edf262d7d12d205a8f6e25c3c9b90c3b3d26a67c2e3b46c3e98c85a. 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/NLA508435703 — a six-check JSON result.
Concerto grosso in G Minor, Op. 6 No. 8 "Fatto per la Notte di Natale": I. Vivace - Grave
Corelli, Manfredini, Torelli & Locatelli: Christmas Concertos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98345f7ece90a75797142b8cbaed577bc27ba1202f35e075c6bd7a85e5087621. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ITX921003099 — a six-check JSON result.
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 0x1f899b5c4d27943ea2cc55d01f54901a1f65d06f55fe75357a7b734b80aa4412. 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/ITX921003100 — a six-check JSON result.
Concerto grosso in G Minor, Op. 6 No. 8 "Fatto per la Notte di Natale": III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe362e6ba4e9693231960e61c0900393e6b2f6456372c41f56972ca9b938faa66. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITX921003101 — a six-check JSON result.
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 0x23505c81cd56e04ffb5b43c52e8d02bbd787f5919134a8e5e13118b47af24b96. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ITX921003102 — a six-check JSON result.
Concerto grosso in G Minor, Op. 6 No. 8 "Fatto per la Notte di Natale": V. Allegro - Pastorale. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629c4888a0d39285ff56d49095f2212ce861e6442078ad9cdc8ae4954caa2517. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/ITX921003103 — a six-check JSON result.
Concerto grosso in C Major, Op. 3 No. 12 "Pastorale per il santissimo Natale": I. Largo - Pastorale per il santissmo Natale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f691fa46f0636ba54357a7c2b52de1856a4666be9bff9ab162c2948cdfe88. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITX921003104 — a six-check JSON result.
Concerto grosso in C Major, Op. 3 No. 12 "Pastorale per il santissimo Natale": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac1f298fde4d3fa6a3677acea9c6ec53724eb44281c3d03cb43248b90186a18. 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/ITX921003105 — a six-check JSON result.
Concerto grosso in C Major, Op. 3 No. 12 "Pastorale per il santissimo Natale": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22c4ccf7bc43b2bd137cd4836f17583af9866339afa1b04c91343378175f833. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ITX921003106 — a six-check JSON result.
Concerto grosso in G Minor, Op. 8 No. 6 "Pastorale per il santissimo Natale": I. Grave - Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c13530814b054d60c0dd2f936793ebb41e3bdf21ca65e7a461b10902179eec7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITX921003107 — a six-check JSON result.
Concerto grosso in G Minor, Op. 8 No. 6 "Pastorale per il santissimo Natale": II. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03df463fc437c408076b5c0bfc0991c072f0f35d1705ce607066e256b4633bf6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITX921003108 — a six-check JSON result.
Concerto grosso in G Minor, Op. 8 No. 6 "Pastorale per il santissimo Natale": III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b15529eabbab101ba154c411b7b74fba150d74831d7adc318403fad923d60d0. 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/ITX921003109 — a six-check JSON result.
Concerto grosso in F Minor, Op. 1 No. 8 "La Notte di Natale": Ia. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf04e7cff6dc55465e941b94f769e1aa2294c7a64656690a5f635257b3261cfc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITX921003110 — a six-check JSON result.
Concerto grosso in F Minor, Op. 1 No. 8 "La Notte di Natale": Ib. Grave - II. Vivace - III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5936c7d0b93f481fc8667c7e8fff694e299a84271083e3ae3c35773a1ee83081. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITX921003111 — a six-check JSON result.
Concerto grosso in F Minor, Op. 1 No. 8 "La Notte di Natale": IV. Largo andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa395dd98878cace31ef94d3cc61e0a405aa3c2f91399aacd1e5d356a73d1c46b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/ITX921003112 — a six-check JSON result.