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 0xe22d40a4937f1fc0a7f845eb3ccecc0d11dfa5177b0fb0eb8fb5985b6e76039e. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd4c49c9-5f1a-4971-84c5-60fbad0e540c.json and https://artists.proofprofile.net/proofs/artist/cd4c49c9-5f1a-4971-84c5-60fbad0e540c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Scherzi da Violino Solo, No. 1: Suite in A Major: III. Sarabanda
Scherzi da Violino Solo, No. 1: Suite in A Major: III Sarabanda
Johann Jakob Walther: Scherzi da violino solo
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 0xe6616a160f13aa5fc109eb8d8bb68795ac9b255cb83d3c8a9e7c4a443f99de81. 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/GBEBL2129403.
Scherzi da Violino Solo, No. 2: Sonata in C Major: IV. Allegro I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abde2443a24b351f0b4d87f4b63889808a3c9843b6abb717a2db22957f1c69f. 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/GBEBL2129408.