Kempes is a surname. Notable people with the surname include: Mario Kempes (born 1954), Argentine footballer Estadio Mario Alberto Kempes, stadium named after him Edwin Kempes (born 1976), Dutch t
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 0xafb14dd5406215ca838fd54f936b23d5eabed220e2ad994984f7fe6c4e2541b0. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e6f058e-b0f6-4540-98d8-37ab064d3031.json and https://artists.proofprofile.net/proofs/artist/4e6f058e-b0f6-4540-98d8-37ab064d3031.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 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 0x114804f5cdaae82e883cf1c3d475da51970ce81378f1c1f4c4ee35c9243df2ff. 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/ROUM71500128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b726c59c8357e416409d9476e895ec0c282c2f966fa71802a1c26bd37becf12. 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/USIR10001170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7972dca4e1598e3ef436561e92a31c5b6acb1a086495395a2a8d58e52ffdd0d. 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/USWU30006502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582e8d4bdb47e63a039d901eee8f70d449c115c8d62fb14099b6d23274491b1d. 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/USC4R1601984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2774ef20fd5ed7371afbadde51e7119f25cf8a9001ef2ce0b2fc71e7c43c2ae. 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/USHR11738186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccf31c296888fcde5e1c5efea2284b0fc1a18cd3602cfe96f4663a55c98342d. 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/USIR19902309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c9bd69c2579a735ca423c261e26833a28aaf053b509566a8a97a14d8025237. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZTB62383846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af7ebd910c0439b76c0724727a59efd50258fb6546a55de0d77e281fd2bd1fe. 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/ROUM71500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60452a3378c2a54fbbb36b23c6f257d6597cbbe58b24b7838eed465cedf93e2a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ROUM71500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed0b77020674020492f2689b55655df18b99f8c7d96cb30f3c1b7c38ab0ba26. 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/ROUM71500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43726a81044424167aa3ffdaeae0ddc267180334937b2a19b259926401bc6d6a. 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/ROUM71500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7855490d9c7c668c320d47ecad1a98e680350b75db355f67753daa5d076e56eb. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ROUM71500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf143082b9492c8b32d1057ca21645f3049d0c3ebd8258af1db20c184e13bf036. 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/ROUM71500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80ff0d1ad64502ac2f5fe51dc4d353d83ac8bd6a328250c2df4200eb1aff120. 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/ROUM71500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a50d8c957c13d3d897ce4d073f8398c374955012250f45a8d9280a22f40600. 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/ROUM71500029.