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 0x656d6572feb0b82d4e439bfe85d8e80f2e61fd7bd246a11e6002a5fc59fa8489. 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/c048ef03-c0a5-4d1e-8162-7e3c6bef399f.json and https://artists.proofprofile.net/proofs/artist/c048ef03-c0a5-4d1e-8162-7e3c6bef399f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Saint-Saëns: Le Carnaval des Animaux, R. 125 -Ravel: Ma Mère l'Oye, M. 77
Concerto No. 6 for German Flute, Op. 2: I. Adagio e grazioso
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 0x5902ba8988519d43b3da7cff0ae09a4e8c23a754bccd4e3f21e895b1d8cea766. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2189010 — a six-check JSON result.
Concerto No. 6 for German Flute, Op. 2: III. Amoroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83fd17c15b386f7c91a3dfad6397ac98257f306c5476f685aaf14a90937c89d. 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/FR7JM2189030 — a six-check JSON result.
Trio sonata No. 5, Op. 2, HWV 390: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf93ef21f92e83b349d62e3d4317d4fb3e0e0653e1e0e928e0ffc946687b60c. 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/FR7JM2189050 — a six-check JSON result.
Trio sonata No. 5, Op. 2, HWV 390: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed508efc615efd39f205ab8cc21381020928920a897f7914d14350de8db2ba97. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2189070 — a six-check JSON result.
Concerto a piu Istromenti per la Fluta, GSM 1711: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d1af1214656475f01210c3fac003dd46fb976227e0d63775d48bd722a88e01. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2189100 — a six-check JSON result.
Sonata for viola da gamba: I. Affectuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1005d26fb8f7ee032e25e05f1d25acf3e2299b92e3fa1e6efd452dee0bc5096b. 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/FR7JM2189110 — a six-check JSON result.
The Caledonian Pocket Companion: Hugar Mu Fean
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a3195f680bad7553ca68f998f738479c038864b28435f53a55c8ebe327d252. 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/FR7JM2189140 — a six-check JSON result.
The Caledonian Pocket Companion: Sleepy Maggy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6298ac000118d7fa6d5051301f03c19041ca55eb0e94920236581e6d476925a6. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FR7JM2189150 — a six-check JSON result.
A Sonata of Scots Tunes: I. O Mother what shall I do (Largo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4278e12104748a2ddf1fb3f2cb151f723e5373a1c790653a134e1a41bad7f1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR7JM2189160 — a six-check JSON result.
A Sonata of Scots Tunes: II. Ettrick Banks (Adagio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ab77e2fb08bce598e2a1d7739ff9386424f9ec9b969a395892ad92456c8aa6. 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/FR7JM2189170 — a six-check JSON result.
A Sonata of Scots Tunes: III. She rose and let me in (Andante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bdee6367da374231ec2b70872bf9bfc57fa5a56d07973346bc852af47d6779. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FR7JM2189180 — a six-check JSON result.