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 0xc3c08aa869ea00ff1e9b3f70bb41a0ba40a70a0fb74ffc16d212b459cdcca441. 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/956e0fc9-1b76-4cac-9f2d-4ca1157fdb43.json and https://artists.proofprofile.net/proofs/artist/956e0fc9-1b76-4cac-9f2d-4ca1157fdb43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Bassoon Concerto in B Flat Major K. 191
Beethoven: "Fidelio" Leonore Overture No. 2 in C Major, Op. 72a (Digitally Remastered)
Borodin: In the Steppes of Central Asia (Digitally Remastered)
Chopin: Concerto for Piano and Orchestra No. 1 in E Minor, Op. 11 (Digitally Remastered)
Gershwin: Concerto for Piano and Orchestra in F Major (Digitally Remastered)
Gershwin: An American in Paris, Musical Ballad for Piano and Orchestra (Digitally Remastered)
Grieg: Peer Gynt Suite No. 1, Op. 46 (Digitally Remastered)
Haydn: Concerto for Oboe and Orchestra No. 1 in C Major, Hob. VIIg:C1 (doubtful) [Digitally Remastered]
Haydn: Concerto for Trumpet and Orchestra in E-Flat Major, Hob. VIIe/1 (Digitally Remastered)
Mendelssohn: Overture from Die Hebriden, Op. 26 (Digitally Remastered)
Liszt: Concerto No. 1 for Piano and Orchestra in E-Flat Major, S. 124 (Digitally Remastered)
Haydn: Symphony No. 85 in B-Flat Major "La Reine", Hob. I/85 (Digitally Remastered)
100 Most Relaxing Classical Music In The Universe
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 0x8bf17cad38287617a119f0570474d9c44831d4f2402f7cc99d75a5bec237a77f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSJ10813901.
Clarinet Concerto In A K. 622: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884d7441f22d7689192423e84d16db3b0e349979bf7d92b4cf05bf1b9a59c3b0. 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/USSJ10813882.
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