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 0xcb25b61f574cb1ec364ed485003aeb8f9f5079aa56c73c53c1e3e6da8b2f8231. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d56806f3-e958-4eaf-afe1-368acf023d40.json and https://artists.proofprofile.net/proofs/artist/d56806f3-e958-4eaf-afe1-368acf023d40.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lekeu: Violin Sonata in G major - Pierne: Violin Sonata, Op. 36 - Fantiasie basque
Bohemia: Suk - Janáček - Martinů - Dolinova - Maratka
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 0xdd572089b284dbe9a671c6a00518d1b252f4baf5f207a6f0c6b572875e40c3c1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FROV61906801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bac76cd8dd0f7bf660895f00d89acb5c2d3b80a5451991c438bbfec5dc92606. 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/FROV62107614.
Matthäus-Passion, BWV 244, Seconda parte: No. 34, Mein Jesus schweigt zu falschen Lügen stille (Transc. for String Ensemble by Olivier Fourés)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c0a13f2abb613f6b3c73c20f0141c1736d0cbd903a8d07a4f2ab76554e343b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:57:39Z), 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/FR9W12470551.