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 0x562c2907027a20daac432f21bb1a0b237ac6dd162802bde54d0b641172b59db5. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8532577-223d-4b1a-97e0-0aa535b217f9.json and https://artists.proofprofile.net/proofs/artist/d8532577-223d-4b1a-97e0-0aa535b217f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Heifetz's Transcriptions (The Art of Violin)
Niccolò Paganini: Concerto No. 4 / Il Mosè / I Palpiti / Non Più Mesta / Cantabile / Nel Cor Più Non Mi Sento / Capricci No. 2, 14, 21
Capriccio In Si Minore Per Violino Solo, Op.1: II
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 0xc8a0ba4d2ab72fb82ce847f54c35bfb8ba08c9e932313d5240652a998d5abea0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:19Z), 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/FR6V89502887.
Once Upon a Time in America: Deborah's Theme
Postcards from Italy - Italian Music for Film
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16173c6d19dd51be4124f4771e3380f431e3409605b4591330a235b33ea8fe3e. 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/GBLWD2305406.