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 0x333a7f27a38a5bb24e619e88c494d485b204cbe6364dfc8e598998f71a1cfba7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f70704d6-215b-4073-951a-b36d2caf143e.json and https://artists.proofprofile.net/proofs/artist/f70704d6-215b-4073-951a-b36d2caf143e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Concerto in D, R.234 "L'inquietudine": 3. Allegro
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 0x85b3b5d3d9e112f533398ff0d93d48cd73a41148f2fadd75627ca5b5c0e63891. 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/GBBBA0900600.
Violin Concerto In D Minor, Op. posth., MWV O3 - Ed.Menuhin: 3. Allegro
Mendelssohn/Bruch: Violin Concertos (Bonus Track Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2989122486e0e44e70517ab968780b72c6892fa4b0599726bfbbfe453a7e4b1d. 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/GBBBA0600600.
Violin Concerto No. 1 in E Major, RV 269 "La primavera": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf7d70bfc170faad89bbc28af8caa05f81517470a363eac5295053feb14cc03. 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/GBBBA0441710.
Violin Concerto No. 1 in E Major, RV 269 "La primavera": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a93f99b2d35b1326be8bacc235fa79adbf479be26bb8ad33bb43f4cdf21490. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBBA0441720.
Violin Concerto No. 1 in E Major, RV 269 "La primavera": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3056548a1cec31478dd1b888fce377861da76cdef44e5e5532ac34356b89be9e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBBA0441730.
Violin Concerto No. 2 in G Minor, RV 315 "L'estate": I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9141cc64d56b70899fad92459d6926bb0729b55a09ae70a0b5bae754f459613e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBBA0441740.
Violin Concerto No. 2 in G Minor, RV 315 "L'estate": II. Adagio - Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dc3d25624af1d467b4d1ba4ffff333bb607f522b5a4d9f893c34a9d6304c28. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBA0441750.
Violin Concerto No. 2 in G Minor, RV 315 "L'estate": III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527b0bba47ee795ba3e81b2ef0aed7b2a9c0c0926390593288109cfc8ed51c37. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBBA0441760.
Violin Concerto No. 3 in F Major, RV 293 "L'autunno": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93113edf3f21fa61ff9f5a0e9d7179d05b85c444a0cbe47d67cf0a539e93763a. 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/GBBBA0441770.
Violin Concerto No. 3 in F Major, RV 293 "L'autunno": II. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48720c5844c06428991d7d313942fe44e9340e6b24aa13149ad41f331354925d. 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/GBBBA0441780.
Violin Concerto No. 3 in F Major, RV 293 "L'autunno": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa03ac9a189e1a9b9c98723d35fd89dbbc1980cf94b84d420fbc4d3884b8538. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBBA0441790.
Violin Concerto No. 4 in F Minor, RV 297 "L'inverno": I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d1220eda5d3ac17b4dbf7fb75faa5e98603ef53d80843dbf7a65018edf3969. 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/GBBBA0441800.
Violin Concerto No. 4 in F Minor, RV 297 "L'inverno": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814760bb2b7e49d633190d1b1b2380e3cb2b5b4d6a7e2597791a6223f65ccfce. 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/GBBBA0441810.
Violin Concerto No. 4 in F Minor, RV 297 "L'inverno": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d64895bae7170eb16b2ef8017a2ccf586377f535860ac75d53314935bf32bb4. 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/GBBBA0441820.
Vivaldi: The Four Seasons, "Spring" - I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf7d70bfc170faad89bbc28af8caa05f81517470a363eac5295053feb14cc03. 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/GBBBA0441710.
The Four Seasons, Spring, Violin Concerto in E Major, RV 269, Op. 8 No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf7d70bfc170faad89bbc28af8caa05f81517470a363eac5295053feb14cc03. 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/GBBBA0441710.
The Four Seasons, Summer, Violin Concerto in G Minor, RV 315, Op. 8 No. 2: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527b0bba47ee795ba3e81b2ef0aed7b2a9c0c0926390593288109cfc8ed51c37. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0441760.
The Four Seasons, Winter, Violin Concerto in F Minor, RV 297, Op. 8 No. 4: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814760bb2b7e49d633190d1b1b2380e3cb2b5b4d6a7e2597791a6223f65ccfce. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBBBA0441810.