Kloos is a surname. Notable people with the surname include: Basina Kloos (born 1940), German nun Cornelis Kloos (1895-1976), Dutch painter Elimar Kloos (1908–1991), German boxer Justin Kloos (born 1
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 0x2442cc1ddee0d2f4ae07784a721f97c93e2692bfef1babbcc438c617fcc15127. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a08aa7df-8146-40ed-a7f6-4a7c21bfd868.json and https://artists.proofprofile.net/proofs/artist/a08aa7df-8146-40ed-a7f6-4a7c21bfd868.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 0x029d8caf45ae6864a4ceab13bb6c49e0ad65e55b519892d6daf70d0d88d43b4c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTB92276212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf323e3ec0e3f99558d5bd62c931a0e9b4516c66f5791192add3a37455d817848. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:52:05Z), 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/QZTB92276213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45ec355ba45e4b0efd058940b0f1081692b648cc5ad2914eae02bb5843820a7. 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/GBMA22441214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d2004177ae2054f070b01fa31791b4d0a5fdc1b5e3e0d037346dd721d3c485. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX53U2359130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d2004177ae2054f070b01fa31791b4d0a5fdc1b5e3e0d037346dd721d3c485. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX53U2359130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abba10e1a4530e5fe19186d8b3c5fbde34d6e2a3c1928ac6dee64cc5300a75a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UKR6V2580211.