Kepa is a service base for nongovernmental organizations in Finland interested in development work and global issues. It is a politically and ideologically independent organization that operates with
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 0xc7b14d272c4c2b6dfca42240464c1787a33c992306ea50e7b5540d5aacc4e242. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b7d9872-b351-4b9f-b0bd-deabd22d064a.json and https://artists.proofprofile.net/proofs/artist/5b7d9872-b351-4b9f-b0bd-deabd22d064a.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 0x6f338299a87259b2e2295c7a4b56b195b79ffdc60ba35003e06b2875137fb34e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:01Z), 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/TCADQ1871015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a3c4c59509b091d86088f86c5f077dd02693dc2ff433402305f74497eee578. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADQ1871019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83a36a84cedfb08afe001bff43c09e4b361e86002ea58ab2cea9ebf6d383218. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADQ1871021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492822d4236d43ef7f0e38074c4642332da1185fdf73c2540c925c9c7d4a0a0b. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/TCADQ1871026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de9b323f373349294ddad7c86ce5ebe9262a2d799061c1e2c9865f8cedaf2cc. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCADQ1871028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77534024cc62cdb4b05c9afa320ecb1e41d42174e714d608aac116a40a182cf0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES72231372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea2216223ff1c30d5ffdc84b920cd50f4871fcfae6909ee0920d3c736e5b164. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHNB2263428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d88214e123254597bf5d2c623f399e796eebabdd417de6050de4adf92a18fa2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6N2261218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdac9ddb0816a2818313470e852c1a981057ecf385d97073c7e58e1de81be864. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:19Z), 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/QZHN82208952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea379c1fc55e592b25953f2b2e99923ffc04630e8445b70f2e016206c6b74948. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZHN62213756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142887c55c3ad11920f84a0b233d56e5b9a377a06a4d21532d97a556cde78482. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:04:47Z), 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/QZK6N2261220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060d3b86fd3f2cd03ee8665403ba504b5898ab67406372ed2e6fb140668cf6d7. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZK6N2261221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f1939e41381aceb7e89392eb1e723ed75b523406ee32f29938b302f4ca71fc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWU2344945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec3d7cd3db652238dae0d85a107dc7c85ebdf51aea9104772bc85d71513689. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFH2378181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dc0ce8f751fa2dfcec7d8907ad15333982faf2d51e96619a4fd21677877586. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:02Z), 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/QZK6K2442751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8277c90ee4e1a02baa56edd3d3b31c96bd1aa7067fbd932744c881abdfbb7f30. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNWS2413466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f67b3d36acf3fb351e53c9575fe4be9b722d1fa180ffbcdb806314c5afdf0f4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:06:35Z), 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/QZZ7S2590893.