thumb | right | alt=Uudo Sepp & Regina - Kaardid Laual | Uudo Sepp & Regina - Kaardid Laual Uudo Sepp (born 28 March 1997 in Kuressaare) is an Estonian singer. In 2018, he won first place in the tel
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 0x772d336e8752239ccdc8dd40371c7fdf08861889a592ba02007297f5f5122199. 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/a9bb9e36-b481-436f-bdca-cda4439a3381.json and https://artists.proofprofile.net/proofs/artist/a9bb9e36-b481-436f-bdca-cda4439a3381.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x7d2ad49c8c7b7c584c1dfb4bd2270b043937ee5e883d2471bbf121afc8d1f30f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FIUM71800335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf5e60f3d99a40f2fc01e409252677f5038435fef230cac8e49e6efe1554674. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FIUM71800512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0a293ffbb663811fca51cdb485b77948aae460cbd88db25d79b8638d9ac5b8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNC1930543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dba9a7e80646a259772cff3bc31df520b71967110387bb4ebf3c8d1f7616e9. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:11:19Z), 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/QZWFL2367512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c983243ad85264743e4129ef23c6c991d5269a0fc931782149c615ee403f16. 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/EEMI11900028.