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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebec5e1de32544a06913b12195a3c4e7963a1b0661889a2005ada017fc1dc80. 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/3460b6b2-d353-4f14-ab6b-a68b5fd46379.json and https://artists.proofprofile.net/proofs/artist/3460b6b2-d353-4f14-ab6b-a68b5fd46379.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Introduction (After "The Carnival of the Animals, R. 125: XIII. The Swan")
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c137fc1aff373ebf682fc98d0d68746aa8293f4559476f17ece675157cfb47. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191832801 — a six-check JSON result.
Suite bergamasque, L. 175: III. Clair de lune (Arr. for Piano & Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd994048823520488fac2b1b4a054ad13eee1f6dca269f98e46c6e8716bca1616. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191832803 — a six-check JSON result.
2 Elegiac Melodies, Op. 34: No. 2, Last Spring (Arr. for Piano & Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b60386908d08a898f8ad9847bd2b3db10991475f55f5012fb6504a16ed9f3a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191832804 — a six-check JSON result.
Kung liljekonvalje (Arr. for Piano & Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1282c20732d55ff23e91675d95319c678e1e126dda42840dfd5124044c64dfa0. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191832805 — a six-check JSON result.
2 Dikter av Oscar Levertin, Op. 30: No. 2, Vårnatt. Allegretto tranquillo e soave (Arr. for Piano & Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40122fe35b4e6b6db33f14a8095d055d4deb6b6e8eab3660a5de148454e15622. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191832806 — a six-check JSON result.
The Mother, Op. 41, CNW 18: No. 2, The Mist Is Rising (Arr. for Piano & Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf934acb6507fd78827c553a2d2b62ddbf77328c5c2f58bbc7d2cc26b7ab2fc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191832808 — a six-check JSON result.
Suite No. 3 in D Major, BWV 1068: II. Air (Arr. for Piano & Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aecb18f27e682ec37bb8bc5e73e62ad4c367481dce3547e9beca38f7b69054f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191832809 — a six-check JSON result.
Herz und Mund und Tat und Leben, BWV 147: No. 10, Jesus bleibet meine Freude (Arr. for Piano & Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538389ad2b0beb165c2b1ecb87c2ee2228a089d8871322a053a6e72aaffd2099. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191832810 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aecb18f27e682ec37bb8bc5e73e62ad4c367481dce3547e9beca38f7b69054f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191832809 — a six-check JSON result.