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 0x4406a42ab13dfa680d69c33d81f91d7e7eb41ebb5de281d18e1c7315b593b5c5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fb11d9c-6b36-4eb5-9b5c-0eee01482900.json and https://artists.proofprofile.net/proofs/artist/5fb11d9c-6b36-4eb5-9b5c-0eee01482900.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sarasate / Arr Cacciola: Carmen Concert Fantasy, Op. 25: I. Allegro moderato
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 0x5adee444ecc1ac28456eb53e84f9f2dd4b682aa6962bb75983f05f50ea038223. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1602340.
Sarasate / Arr Cacciola: Carmen Concert Fantasy, Op. 25: II. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b4ec916b4a8f391485d44a6bdd3656245cefde72552715ed8b99b66838e246. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBAYC1602341.
Morricone, E & A / Arr Cacciola: Nuovo Cinema Paradiso: Love Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eda937be9bac55e9ab800476ca7d7582899d99227df83a7df40a98fcaecbdbd. 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/GBAYC1602330.
Vivaldi / Arr Cacciola: Le quattro stagioni (The Four Seasons), Violin Concerto in F Minor Op. 8 No. 4, RV 297, "Winter": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5525946a009ad9cfbaeaf27609342cc9db1f841459a0e824544e6ffdd4df17c8. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBAYC1602345.
Paganini : 24 Caprices, Op. 1: No. 24 in A Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2286910507e6794b95eff69bab6f7645b3f8c2d48ef77c361f56d98231f4678. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1602346.
Paganini / Arr Cacciola: Violin Concerto No. 2 in B Minor, Op. 7, "La Campanella": III. Rondo "La Campanella"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f7c0e6bd5fdd7ef6a6c39070c17231932932ad621d26fba80059cf4c2fc450. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1602337.
Rota / Arr Galli: El Padrino: Main Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6dffcc60661499988e6060be892b35b54f0c3da0dc351e706a4a117ccd8a01. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBAYC1602333.
Piovani / Arr Cacciola: La vita e bella: Main Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7177a3aa54f70bd95f3232357689f5c1bad1770b2469d02c47dbdb848676d5. 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/GBAYC1602331.