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 0x1e6c62d94f3f92a2f21cbff3428278e6e6d35fef61557e04685f509ad9364bbb. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/754579a1-2cc6-4518-8ba1-d4587864cde9.json and https://artists.proofprofile.net/proofs/artist/754579a1-2cc6-4518-8ba1-d4587864cde9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Quatre Variations sur un Thème de Domenico Scarlatti: IV. Variation III
Solos De Concours (French Music for Trumpet and Piano)
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 0x60f7c007a6f68180fdeef6050ac875f1f4d318a7b12bb28181a7fad5d6b4b972. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEE210652115.
Quatre Variations sur un Thème de Domenico Scarlatti: V. Variation IV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd378323a422c04a0309ab31414ebc22420fbbf348370719024641d22658694ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEE210652116.
Fantaisie en mi Bémol: III. Allegro molto, con Fuoco (Arr. For Trumpet and Piano by Henri Busser)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cd00e9e84bfa65ed91813347df6628028e1a6ee187253657f4868b16f58a06. 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/DEE210652119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa542ba9fcfa46caa6b4ef6772d833dd5b96bf546243db99ec3c379113e5268ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEE210652120.
Quatre Variations sur un Thème de Domenico Scarlatti: I. Thema
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f191e619ee3dcac2f48677ad8209421966689edbe0cf6f92db386e7958f43ae. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEE210652112.
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
Quatre Variations sur un Thème de Domenico Scarlatti: II. Variation I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d89c9926be40e5f5495725db78fa3831ae88d9c3a9ff8e061488c36dfa08265. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEE210652113.
Quatre Variations sur un Thème de Domenico Scarlatti: III. Variation II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91181246a0f604f32e6b4c7f2e0540f16a4d09c26daf2a40e814aca52a26c4c8. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEE210652114.
Fantaisie en mi Bémol: I. Andantino con Moto (Arr. For Trumpet and Piano by Henri Busser)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0478bd71e1aa2fa2f4514a7f88d01e1568d9f5d6788ea2eb240a9f69fbfd628e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEE210652117.