Pēteris Plakidis (4 March 1947 – 8 August 2017) was a Latvian composer and pianist. Early life Plakidis was born on 4 March 1947 in Riga, Latvia. He was educated at the Emīls Dārziņš College of Music
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 0x72196284c0bd8758fbf5aaf8efdf8c7bddb8f30eb36a42b2e67d62b221cab55d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58009769-7788-429f-8da2-a625936644a5.json and https://artists.proofprofile.net/proofs/artist/58009769-7788-429f-8da2-a625936644a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Little Concerto for Two Violins: III. Ceļš
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 0x16e36910b791c1f9dadbbe6438e79b58228ce37377220ae545ae4ed53623f060. 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/LVL152200826.
π = 3,14 for Two Double Basses, Percussion, and Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33846c05a629f9adc25ac173bb667d51245270330a5d35c8743881e623b33538. 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/LVL152200823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111b8da4ed9fe560bef97a94b869708bbf0fa21a11ce152ea4433531b8b44156. 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/LVL152200825.
Little Concerto for Two Violins: I. Sadziedāšanās
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a2d0d3e213b6a4d400666c96ca6b92279ca417a042f21956bc2f0346dba82c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/LVL152200828.
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
Little Concerto for Two Violins: II. Vakara mūzika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb965187fad90d3617a6e1fbd57ff0e9525b1aa610b357d6941dd66f3c7022918. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/LVL152200827.
Pärt: Cantus in memoriam Benjamin Britten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef349a22d077def251a19cb8139fe299fcbfc8c0d819ffcd73c725e05831958. 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/GBAYC0003352.
Tormis: Swing Songs: No. 4, The Swing Asks for Gifts
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096cf3b9570ffd13c3ab7e2357d8561b67ae4cfa219e1dfcb866bcce37ecbd4d. 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/GBAYC9502943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6560b7f5f3a893467019053515963228e422747d9321facb67802a88f5666de5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13b3f79ce6d7e509b5a654bbf33c012143312e09de6911c6b0f942bed2f1a9b. 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/QM6P42212673.
From My Home. Music from the Baltic Countries by Pärt, Tüür, Vasks ...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5b7343b42fca68a8561323bdb8eda3822254386e5a5cfda4cda00b5042f227. 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/LVL152103028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a58f204d84498961cb91e62e9ac58147f5dc6d8b262f4bdc614c05566efe5e6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/LVL152103017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd773fa01c2faa5400315d8c59e97b57cf1433b260df08324832d30d06a573f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/LVL152103012.
Kreek's Notebook: I. Nüüd ole, Jeesus, kiidetud
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.
Other Colours: Latvian Composers for Flute
Enescu: Impressions d'enfance - Schulhoff & Bartók: Violin Sonatas