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 0xe907a733033899dd62ea8287f788b11146f2ab62a22e0bad62896dc9e61c3733. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c96937f-7b94-4e59-97be-93749846bcdd.json and https://artists.proofprofile.net/proofs/artist/5c96937f-7b94-4e59-97be-93749846bcdd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Debussy: Petite Suite No. 1 "Im Kahn" (En bateau) (Digitally Remastered)
Dvorák: Sonatina for Violin and Piano in G Major, Op. 100, B. 183 "Indian Lament" (Digitally Remastered)
Grieg: Peer Gynt Suite No. 2 for Violin and Piano, Op. 55 "Solveig's Song" (Digitally Remastered)
Gounod: Ave Maria for Violin and Piano (Digitally Remastered)
Gluck: Orpheus & Eurydice, Opera: "Melody for Violin and Piano" (Digitally Remastered)
Kreisler: Schön Rosmarin for Violin and Piano (Digitally Remastered)
Mozi: Romanian Dance (Digitally Remastered)
Classics For Babies (Early Childhood Stimulation, Education)
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 0xde1ddfcc33c409dfd39565e5826822f026cd2ab8a1236bbb1bbf35a77af29124. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEKU70890509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe4323d8defbbfbb136ac95feddee80385f4f004cfdefd303c5d976cc6fac13. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEWDL0759911.
Alt-Wiener Tanzweisen (Old Viennese Melodies): III. Schön Rosmarin (Lovely Rosemary)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba0c01541e65a281e259755df9d2a73f0da0ed072ef7bd238cdd120bcf74d95. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWDL0759910.
Peer Gynt Suite No. 2, Op. 55: Solveig's Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945b77691f353b0f0920f394b36a2bde8951360e477c4b45da964c0eb57b85ea. 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/SEWDL0759908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c37fcdf097b35c51f2fd4bbf4c4259e1b95ab319583fa9ba3925d158ca519. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEWDL0759904.
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