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 0xcbede859e009738748b78f3714c34e8462fdad71fd13143327a604bcb70b0efe. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/955f2bc8-b60f-4569-adc8-457b8b3f4453.json and https://artists.proofprofile.net/proofs/artist/955f2bc8-b60f-4569-adc8-457b8b3f4453.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Prokofiev / Franck: Cello Sonatas / Faure: Piano Trio
PALSSON, Hans: I Doda Mastares Sallskap, vol. 3
Palsson, Hans: I Doda Mastares Sallskap, Vols. 1-3
Palsson, Hans: I Doda Mastares Sallskap, Vol. 4
Palsson, Hans: I Doda Mastares Sallskap, Vol. 5
Sonata for Two Pianos in D Major, K. 448: I. Allegro con spirito
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 0x81833a71f493ff5d77b64b31bb926f71371285161cf4d9807692671706f91311. 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/SEAEA9458010.
Sonata in D Minor for Cello and Piano, L 135: I. Prologue: Lent - Sostenuto molto resoluto
The 50 Most Essential Cello Masterpieces
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31b8eba2a4f784afdbf31676b00dbfe8f67acdd7b9fcf07c7a61fb169b1e77. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEAEA9528080.
Sonata in D Minor for Cello and Piano, L 135: III. Finale: Animé
The 99 Most Essential Cello Masterpieces
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84d83d7887afca64e669fb6443834832d1e1ae71f209a553086b05ab9a6e43b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEAEA9528100.