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 0x08e3739b5f5bdebafc6671acf5e4d208fb3673261196a818bec1548e2c95cbe4. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac32db59-d8e9-463e-8c14-998a47a10d24.json and https://artists.proofprofile.net/proofs/artist/ac32db59-d8e9-463e-8c14-998a47a10d24.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Boccherini: String Quintet in E Major, Op. 11 No. 5, G. 275: III. Minuetto
Classical Music: The Greatest Love Themes
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 0x91a7f28bf8f612963ce5f822319a3e19116edac334cb38c836ec29ff88e78328. 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/GBAYC9903580.
Allegretto melancolico No. 2, Op. 105 (19th c.)
Meditation Music: Meditative Music Across Ten Centuries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342fc6185ba46bac038f7db41e0f0238048486aff3c55b3c5f9ae0ce5a8ab08e. 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/ES7141500254.
Violin Sonata No. 1 in D Major, Op. 2: I. Adagio (18th c.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c700ea5a85b8c16dc597db027ae3b4f8836cbe4f11091c33b362834cc8f743. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ES7141500245.
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
Violin Sonata No. 10 in F Minor, Op. 2, RV 21: I. Preludio. Andante (18th c.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd563f89d43857695694147d69bef650f9995a2e34642fa05537a4aa39115840. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ES7141500247.
Violin Sonata No. 7 in A Major, Op. 1: IV. Largo (18th c.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14579d1c3a587788bd293d9f028269cee7aed04cb68dc30c57bfc727301ae4e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES7141500250.