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 0xc87a1f6583ab82232c059bcc981623337cb0d4233b04debe2eef9570a8f72a1e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60b99421-032e-47b2-a1f1-4b6fdb0e561e.json and https://artists.proofprofile.net/proofs/artist/60b99421-032e-47b2-a1f1-4b6fdb0e561e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto in E Major, Op. 8 No. 1, RV 269 "La primavera": I. Allegro
Orchestra "Classical Music Studio", St. Petersburg
Vivaldi: The Four Seasons; Violin Concertos RV. 522, 565, 516
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 0x4d6cf7742be49dd44312caa77b2ed85c160c023b52ba1750c0b198adfa2211b8. 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/USSM19915286.
Concerto in G minor, Op. 8 No. 2, RV 315 "L'estate": III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c4f75b9e24c4c8e215ef95356688df5f510e254cdfee319ff663b669814cb0. 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/USSM19915292.
Concerto in E Major, Op. 8 No. 1, RV 269 "La primavera": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526ff991bfff8f8d1f62d18958b21ec50064e46cf8cf0e3762725e1789ff50ba. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19915287.
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
Concerto in E Major, Op. 8 No. 1, RV 269 "La primavera": III. Allegro: Danza pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f28f6a4a435d15a2bc3eca095879b247200ebe4b3ed5dab1bfc15b1170c1484. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19915288.
Concerto in G minor, Op. 8 No. 2, RV 315 "L'estate": I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abb8c486a9cb83d44b6fcf421fce365bb27f1c1202200c25851d2b89f79f32a. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USSM19915290.
Concerto in G minor, Op. 8 No. 2, RV 315 "L'estate": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92db12851ea4fc1a6a5b4eac5297060362efd09c45a37de8b4e5821f73538af5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USSM19915291.