Events By place Africa Khazrun ben Falful, from the Maghrawa family Banu Khazrun, begins ruling Tripoli, on the African continent. Asia March 17 – The Buddhist ruler of Butuan, in the Phil
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 0xbae3520a3b9240f390fff7b657ecf3327809fde9b4d7f18e5ecb91795fc52f75. 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/c12aab75-dd36-4931-a96a-91972e8fccec.json and https://artists.proofprofile.net/proofs/artist/c12aab75-dd36-4931-a96a-91972e8fccec.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 0xcc060adef4b8b8ba8a8bd6fe7bd041b76b2e94ffb613d203c55d205e222bf0d9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZMEM2117900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d9e648909c07fcfd26fab0bd76da443846bd9046b571ac25063b9052d2932a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAT2189051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc849aa45d109798ed4be7cfe3ac3159f5fca1bbcf25f0406232db730aebd8f14. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAZ2267130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519733ce11dad11a043ed9192d6a357a4c2a3b7388185bd68914bdf9b6d931c2. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZDA62304576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fed46fd39f0f57e38f9e5516a1aba218b81190de22ff388114d50031e04d97. 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/USDY42314039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96061a6551208e4c65b2d939368d7fe8e79c08cbdc6ca48c9394c37e31240a45. 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/QZTB42315965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97ad78cb5d04c9cdc6bd89a38ac1ad33d4fe018809af7fd7dfbff0e90ec8747. 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/QZFZ62435380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6ba7a2ab732ff8633011bb7af079ccf1f82a58da0ca3e80c9798830bbbed9e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZHNC2467069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad94c06bdba08e805e824513434659897e82d55e2239c2a7d3af7c3471ebef6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNC2467070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99845cc1c94aedd3ada9d2a86020f02cb317b1e6bd1d2427453ac04c5c28624a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZHNC2467071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61dcd02615bca60a3dcd7e715aa96deb2afa814cacd7df8471bb87675f7c386. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTVM2442175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9574db5b910220f06d4d2ea386a9ea1dabb359d419a2f49629ef8086aa414b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZW9M2464242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ea4c2261bd27f669bb4cced8f66904852c61cf5ac794f133b12792289f7f4c. 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/QZNJV2537199.