The Youth Choir BALSIS is a mixed youth choir in Riga, Latvia. The choir consists of some 50 young persons from Riga and other cities of Latvia who are permanent singers with the choir. The choir perf
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 0x57e68e3b594b56f42af506c44e7996fb423d707e1f45a6dcc70994c79e00fdf4. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22b0e39e-31f9-47fd-9868-5fdd73bb571d.json and https://artists.proofprofile.net/proofs/artist/22b0e39e-31f9-47fd-9868-5fdd73bb571d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Eriks Esenvalds Passion and Resurrection/Rihards Dubra Te Deum
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 0x7840d776d5e574bd37cbbccbb59308e507e6d8a40d342d3b8195bae041d2643f. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/LV06A3300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3f5fd4d48cbbb1efb8d5582597ff382bfd27a3a29aaf622202edaf2f9f9c88. 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/LV06A3300005.
Latviešu, Lietuviešu un Igauņu Kora Mūzika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39c514de531d34e8fa1d9e0614c6148bcfcdb3ee4921d802582cf3313348565. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/SEYOK1960350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e2c1636e109b26e158090faaae2119d16d629e7edfb1b25186ec500d5db68. 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/SEYOK1960352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c46584a3ee0a94397188011bb6318d9a55d20d456bc7a98ca3cd984717fe55a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SEYOK1960353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2561d34ba121bd5f052be1629838051ce224db87aae392f84a2ab0ac2b2543f8. 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/SEYOK1960355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011ca1f2d4a049c44835c34f431839d54907f6202042d194ccc682575dc96ed5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SEYOK1960357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3433930538a1ace867f4e03144d84955297154716cb533b63f8152ca67dcf870. 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/SEYOK1960361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734ebaa831491fd4502f454dd1631f6ada33d5fc353a529b212dace0d5b7b1fc. 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/SEYOK1960364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342d37bdbbaa2e7ac332baa01d87b2428130dc840a1293299c758943ac3d8649. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEYOK2000728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb8289d5d13e283fb25a7cfe56d5b251c89a13775404a5389b0b14681f6c4bd. 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/SEYOK2000729.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19acedcb7ff8590d7f0e04edc580aa1520d73d43b8f5d32abc0c1abb69e3268. 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/SEYOK1851444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb16a89e79751e7f38f2d510b11d5823098a2e3f2272668ee0eb932dd8e0dbb. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/SEYOK1851447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb1a6061054caa80d3cb7e540f27de0aba47e2d260fb75131e2ff28528405cc. 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/SEYOK1851448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea2ca5541677b2a148c7e8f90564f0f1eed4a3b62cb06e846b96e57742a9944. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/SEYOK1851454.
Latvian Solstice - Cantatas of the Winter Season
Songs About Latvian Rivers / Dziesmas par Latvijas upēm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1399e4a6425808710c88a15146971023c94f032120443264c866e0eee7e6ffb. 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/LVL152202676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033de55416407cc01583eb5ac0f90d7afbab1ef53a845d469939fc8d920f2963. 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/LVL152202672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c42489a524435683679a03d831f706446e14c6997dcdd40cc0e00f4ac2ac1cf. 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/SEYOK2001722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792e70568881f51bf20ea28efce18022bbdddf82db5165c2ea8a036b9b6ec7f8. 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/SEYOK2001733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184ca6d8dca74458ce3aeada3bdfd0df674cd28d7d147a96ae911432ae65dc6b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZPLR2041762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734f9991eaf6a302bbafb417ecffd336e6ef54c191dfdb38a32a18bc5305e3ce. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZPLR2041763.