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 0xbc06840d97c49067684cb9c924e5a00ad056e028146425ba8145b0c83d642f86. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9978a22e-b286-4841-9fc0-88e002dd4533.json and https://artists.proofprofile.net/proofs/artist/9978a22e-b286-4841-9fc0-88e002dd4533.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Solo 1 - In the works of slovak composers
Violin Solo 2 - In the works of slovak composers
Violin Solo 3 - In the works of slovak composers (Live)
Violin Solo 4 - In the works of slovak composers
Violin Solo 5 - In the works of slovak composers
Imago Sonoris (Live at A4, Bratislava, 2019)
Concerto No. 3 for Violin and Chamber Orchestra: II. Agitato (Live)
Milan Pala Plays Alfred Schnittke (Live)
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 0x97a5542ae868b3b7739ebae69b69c50eda25aacf5cb71fd16f7e12c604d5bdb9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SKB262119702.