Liepāja Symphony Orchestra (LSO; ) is the oldest orchestra in the Baltic States. It was started in 1881, when the first Philharmonic in the Baltics was established. After the World War II orchestra re
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 0xb00ad0e80b1a5c903d629d0f505ad60ea7df0561b5927988581e68e3a30cbffb. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa02fa59-a8e0-47c8-b931-bd50f009b95b.json and https://artists.proofprofile.net/proofs/artist/aa02fa59-a8e0-47c8-b931-bd50f009b95b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kancheli: Styx; Tavener: The Myrrh-Bearer
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 0x058d55604f3a61074c80e5537b4486dd9ef517ea270c245ecc7132242aa08209. 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/GBPCP0700134.
Imants Kalninš: Complete Symphonies & Concertos
Soundtrack to the Film "Pūt, vējiņi": Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7659d5e857490aa882091c9f2ece5e98d246715225a246fd022cd56dcc43d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/LVL152004506.
Kalniņš: Symphonie No. 5 - Symphonie No. 7 - Oboe Concerto and Santa Cruz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde82db66164b08fded6aeffac9199fef327eba0c4b30760b12b279f6b7ae597b. 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/LVL152303037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b4aaf92436e7294af18766ad2fd38fe6e03a5809e6073d44b664457f52b354. 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/LVL152303036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccfc23a0bbd21c6035cec989a68f925cd2941c00d84b209f0c669d53a397871. 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/LVL152303034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213d778ffa7f62e796693b8af0277b18bc29303d9cc0bb372497014bd0e7fc0c. 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/LVL152303031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7789110108a2a4599028abbb2165687f514e1e287fbb73711e4cb0b6896140a. 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/LVL152303030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0787249dd765f4bc7f43241e8994fac723179ef7a04e71fb8dbfd335181f6b27. 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/LVL152303029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7692b6cc92eb1d62f13c4e8ca0793170f0e21b31c4d1ef02dec7e92af5a12f. 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/LVL152303027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786e6a33933a520f266259392f5fc7f538e506b5c158a5916c19328802e82264. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/LVL152303038.
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 0xb9fc66197c576b20883b734f05d8d437cf699ee5dbf4a0926d41f8ddd9b931d4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/LVL152303035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a2c26e18032c246bc9e799f1112418554e46038d1a63d23cce1ae8b4c242f4. 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/LVL152303032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c9f29cebfb09fdd9d1e3f70979dec9b6c377a4bcae530a440946ac975c4c89. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/LVL152303028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6419076e6cd9a95b8a6e699afa48f9d47f8cf7c485e9f63ee48a829c5bbb3b4. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/LVL152303026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb7deda4cc9be48cc718b305b82cc30f4f298b8166f7a6272cffdd5af0fe8a9. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/LVL152303025.
Derek B. Scott: Orchestral Music, Vol. 3
Juris Karlsons: Dances of Life and Death
Derek B. Scott: Orchestral Music, Vol. 2
Pēteris Barisons: Three Preludes, Symphony No. 2 (The Romantic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7e157e518f4cac7799c67f6079a3b656075de21211c1cdc84957fd58ef9d80. 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/LVL152103790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb7f1b134c48a2b924e73a38b199f5c266437d28ae33fefdf33b07119dc3620. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/LVL152103787.
Kārlis Lācis: Piano Concerto, Latvian Symphony
Arnold Griller: Orchestral Music, Vol. 3
David Hackbridge Johnson: Orchestral Music, Vol. 3
Piano Concerto: I. "Lento pesante" Allegro sostenuto sempre ben marcato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a78f266696a20e407d9dd9966960385a283065e1e27a58c3fc815000f0abedc. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/LVL151705649.
Piano Concerto: III. "Maestoso" Allegretto scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fd8477c144e554fb41284d48267038611af1bee281c7343919895393e3646a. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/LVL151705647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7456cb313b3ad1f65d1f2a1d257c099327fd5e25014c739cd3294c09d392ff58. 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/LVL151705646.
Piano Concerto: II. "In memoriam" Grave - Quasi andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c832ac6fc8ebdaea4143cbae4a617aea39c8559785e87760721850b13f6a8ea. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/LVL151705648.
O'Brien: Complete Orchestral Music, Vol. 3
O'Brien: Complete Orchestral Music, Vol. 2
Charles O'Brien: Complete Orchestral Music, Vol. 1
Solberg: Orchestral, Choral & Organ Music