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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe066aab89f6a21f9ca16c215d891b00ee9571851b07c3de568e5694dc9d1211e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). 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
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 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.
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.
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 0x1b849c3939e1d01b7954fa1693b2aeb0c8bc21131c2a5adf1702483da78a2f9e. 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/DEB331862011.
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 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/DEB331862013.
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.
Kreek: From Heaven Above to Earth I Come
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013ae7f988c37b0f6fdfac19e910f14ad11b8e1656af861cad4b7370b021ed48. 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/DEB331862002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4415dbc8af78a56266669b816ec8953f52cb18c88cd62475ee0d29f8fa8406db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB331862001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf629b4d31b68c4631fd1d347252e00ac747a73f129db196cb6b4d947510cfa16. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA561300514.