Arturs Maskats (born 20 December 1957 in Valmiera) is a Latvian composer- - and since 1996 artistic director of the Latvian National Opera. His orchestral composition, Tango, received international e
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 0xdf429c93816bbad3e3ccda5ba6dbb29bf77b51d75c9ff8e3971c9d149250390a. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e2e8a08-5974-4f41-b9e4-9d1ddf3a1bee.json and https://artists.proofprofile.net/proofs/artist/7e2e8a08-5974-4f41-b9e4-9d1ddf3a1bee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kreek's Notebook: I. Nüüd ole, Jeesus, kiidetud
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 0x5d4312d7044887d2ac53a997acedf9eb88f17be4971a6b73e0c9d32decb70899. 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/GBAJY1396801.
Kreek's Notebook: II. Nüüd on See päev ju lõppenud –
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf4e39934f3fcb2fbc6720fb87291a13eba2b4817fc0608c0d9249eae8c37fe. 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/GBAJY1396802.
Kreek's Notebook: V. Su hooleks ennast annan ma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e82526b5c293a1edd9cf040144204035fe2651262387c7ced1528050e7705. 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/GBAJY1396805.
Dawn Is Breaking: Choral Music from Latvia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7c0bca59ecd8c29d48e1ef6ceea12a9b2ba73b60f15dffc5a58505b383f6c2. 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/GBGCS0800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71c79fb33e636ffdc7e1cc53490ab12816ba8239881b51a0e9e5fbd6196fad1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEYOK2000732.
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
Sommernachtskonzert 2022 / Summer Night Concert 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1939c678573e0664f6b7e780eca63adde7d18b01210315a48773763e085d0e80. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USQX92202977.