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 0xd5c31eeba67e7961db6523737b28aae981fa3651740d648c92e006594187bfba. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24fe0b74-8314-46e5-b71b-915b1f625fe0.json and https://artists.proofprofile.net/proofs/artist/24fe0b74-8314-46e5-b71b-915b1f625fe0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Concerto No. 1 in D Major, Op. 6: III. Rondo (Allegro spirituoso)
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 0x26f8c48e69266f48f21c8bf4a964a7e641886f507e076a7dd641a3e6082df9ef. 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/DEN960500723.
Violin Concerto No. 1 in D Major, Op. 6: I. Allegro maestoso
Paganini / Spohr: Violin Concertos incld. Listening Guide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8a67eca957b4d63bd4d1a863b6e5d0d9c6e86962bbe6bdc4f0900968d897fe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEN960500721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f8c48e69266f48f21c8bf4a964a7e641886f507e076a7dd641a3e6082df9ef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN960500723.
Violin Concerto No. 8 in A minor, Op. 47 (Im Form einer Gesangsszene): 2. Adagio - Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a6a6ac357e945bfd454adec48e9ce6c6e841a4305e979bee84d2ff59a21dde. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEN960600832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8a67eca957b4d63bd4d1a863b6e5d0d9c6e86962bbe6bdc4f0900968d897fe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEN960500721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a6a6ac357e945bfd454adec48e9ce6c6e841a4305e979bee84d2ff59a21dde. 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/DEN960600832.