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 0x340a9812ac5c2291b2e9df60d815a6ec3a110cf3a2643d6cd16c72b7ea1f2a92. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb290694-bbd7-4376-adf4-4900eed20249.json and https://artists.proofprofile.net/proofs/artist/bb290694-bbd7-4376-adf4-4900eed20249.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bizet: Carmen, WD 31: Ja, die Liebe hat bunte Flügel (Habanera) [Sung in German]
Wagner: Tristan und Isolde, Act 1: "Frisch weht der Wind" (A young sailor, Isolde, Brangäne, Kurwenal, Tristan, Chorus)
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 0xdbad50ab455d42161200c12c5094d393b06937b5e76e6e0442c9a5a7ed8cbb95. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEA809428603.
Beethoven: Fantasia in C Minor, Op. 80 "Choral Fantasy": II. (e) Allegretto, ma non troppo - Presto
Beethoven: Triple Concerto, Op. 56 & Choral Fantasy, Op. 80
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092de33a95bda676eb348a0900cdaa6162660f6867efb02cc8776ac5c029238e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:35:23Z), 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/GBAYC9500414.
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
Wagner: Tristan und Isolde, Act 1: "War Morold dir so wert" (Tristan, Isolde, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94430e50622f7ca036288ff54cb7c6eaa81a78b2a7acf895c35f9d11c31a6222. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEA809428608.
Wagner: Tristan und Isolde, Act 1: "Tristan!... Isolde!" (Isolde, Tristan, Brangäne, Kurwenal, Chor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82ac8b14fb28c3d1fd1519ad74e49635bce168da9a0ee75ab1bc334b7a13781. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEA809428609.