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 0x2bc538b6efec15f3ac4058690e2979f01a36e019fe23389967f7bb11ae8e7c46. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9e32e48-0a25-4557-ad30-8f0783b940fd.json and https://artists.proofprofile.net/proofs/artist/b9e32e48-0a25-4557-ad30-8f0783b940fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Patterns in Motion: The Great Minimalists
Aeternum: Latvian Composers for the Centenary of Latvia
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 0x5ceb8b08afa577ceb8f33c8e52261456a766c68cf3193898d6068ea5d87f059b. 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/LVL151706864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5b916dc9bea20cdb05f9a5077ce22563dea8933159f4b006232b3339672fa1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6N22039999.
Gabriel Jackson: A Ship with Unfurled Sails & Other Choral Works
Eriks Esenvalds Passion and Resurrection/Rihards Dubra Te Deum
Joseph Rheinberger, Francis Poulenc, Einojuhani Rautavaara
Between Two Eternities (Choral Songs by Leonids Vigners)
State Choir Latvija and Organist Atis Stepins in Riga Dom Cathedral
Sandström: 4 Songs of Love: No. 1, Let Him Kiss Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc135925777264ebdd582f1e9f34ec1e9610f4df114e80e7f354958d664161b. 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/QM6P42052447.
Dawn Is Breaking: Choral Music from Latvia
Kancheli: Styx; Tavener: The Myrrh-Bearer
Dvēseļu Putenis (Blizzard Of Souls) [Original Motion Picture Soundtrack]
Imants Kalninš: Complete Symphonies & Concertos
Ottorino Respighi: Lauda per la Natività del Signore
Kalniņš: Symphonie No. 5 - Symphonie No. 7 - Oboe Concerto and Santa Cruz