Cyrillus Kreek (born Karl Ustav Kreek; in Võnnu, Lääne county – 26 March 1962 in Haapsalu) was an Estonian composer. Kreek studied trombone and composition at the Saint Petersburg Conservatory fro
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 0xe066aab89f6a21f9ca16c215d891b00ee9571851b07c3de568e5694dc9d1211e. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cffb9260-ea4c-44e5-b53d-0c8db479c65d.json and https://artists.proofprofile.net/proofs/artist/cffb9260-ea4c-44e5-b53d-0c8db479c65d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cyrillus Kreek - The Suspended Harp of Babel
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 0x4415dbc8af78a56266669b816ec8953f52cb18c88cd62475ee0d29f8fa8406db. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB331862001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013ae7f988c37b0f6fdfac19e910f14ad11b8e1656af861cad4b7370b021ed48. 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/DEB331862002.
Jacob's Dream / Orthodox Vespers: Proemial Psalm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5817082e8574052660604524d1ac1f7347ce507497ff6b62d58f4093ca5956. 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/DEB331862003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d5557010c9e979534fae1f2a924fe53db1d6a26711480f44155bd31e970e42. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEB331862004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e73187d2de9e2a824589811d3424c8b3cb8e65ea90389af0aad8a3b39da1ac5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB331862005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bec6e8e4b6d5c3f286ab8798ef9fac44203ee510aa58f4f4217d52ddee311d. 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/DEB331862006.
Orthodox Vespers: Praise the Name of the Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f59dabf44cd63acaa1edf05a9fb9981ad94a9222d248e5b90bfbfb46fba31a1. 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/DEB331862007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc4b1490d5f5827edf877e593f1f60b7dd5c318376453dd91241a952fc2487c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEB331862008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea7d8892270c7b574a40a7a6c8cda9e47e6e6a505a8791a9d6661ae697e1efc. 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/DEB331862009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c6b82523231691d72855f0fa348e873f0092c4a62a6e3af3e61c2ca7116c9f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEB331862010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b849c3939e1d01b7954fa1693b2aeb0c8bc21131c2a5adf1702483da78a2f9e. 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/DEB331862011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a4d0c70b9482ea0fefd876fcf27ecceb57a72b592e17af29f3b074e020b271. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEB331862012.
O Jesus, Thy Pain / Dame, vostre doulz viaire (Arr. Ambrosini and Eller)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559f04333d294d3f47937698c61ddc32d5698fdc31038ecad38f988da9fea382. 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/DEB331862013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37039b55895368fa3da00e53e5e6f277fc59c03c468f28f2a4d619bc0bc4319. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/EEOA32000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd114db3d4802a04a9d9ac992e77485ed20b92719e2a6f2e51d34d4b14396dd. 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/FIABA0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4bfdd94a6ffdb4d842b04d3719007484ac4d7ca720f39eeba582b6139fdee9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FIABA0600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c226f7d69c396369d009c9a87a7e82ff484cfb12ddc84d80c7cc6010aaf66d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FIABA0600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308a37038f55be9a76559193585e1730c9810e10ee03c11b5b700c9b0c1e6940. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FIABA0600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb35f4a307736342127106015ca238ceefdf0f9a8a6981765d5a8838f69672f8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FIABA0600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6439be0f8d0fa64f1b2293be864afb7b4336a4fb315a2f2163639a8abd5f9338. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/FIABA0600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb6896db63a6d5be7aeb81dcfa168525c60e3277c0b3ddcf76d6d3c8ae6513e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FIABA0600018.
Kreek: From Heaven Above to Earth I Come
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d5557010c9e979534fae1f2a924fe53db1d6a26711480f44155bd31e970e42. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEB331862004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013ae7f988c37b0f6fdfac19e910f14ad11b8e1656af861cad4b7370b021ed48. 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/DEB331862002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4415dbc8af78a56266669b816ec8953f52cb18c88cd62475ee0d29f8fa8406db. 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/DEB331862001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf629b4d31b68c4631fd1d347252e00ac747a73f129db196cb6b4d947510cfa16. 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/USA561300514.
Psalms of David: Psalm 104 (Bless the Lord, O my soul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c70853e3716c67c8a51dee0d18d8689516304d79790745d6a1144e04e8d4221. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USHM10231101.