KDD may refer to: Khuzdar Airport (IATA code: KDD), Balochistan, Pakistan Knowledge discovery in databases, a form of data mining Knowledge Discovery and Data Mining Conferences, a series of confe
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 0xc4a260528b9512236350201b9e716a5fc1385467d62a1234611006ec7c1b5053. 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/47cf92c7-07a6-4ece-b6bb-4a5f9d119f72.json and https://artists.proofprofile.net/proofs/artist/47cf92c7-07a6-4ece-b6bb-4a5f9d119f72.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 0x2290e0a29897f7ac1d218e094c4bae79d381335ee8bee5644a584c9447fc10fb. 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/FRZ089600440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f45d9f9d93b4653df72aa3659f9d95e3512bffc323ebf5017dc06d119a4bdb0. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/FRZ089800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0ac289857ad620328f8831ddd6b188c74f135c1a2f2ef1d3c6b795d81f258a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRZ089800310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48d32f467fdce2d1d6909e8b8af1b6a52413ebb43fb516601f719313ebad51f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRZ089800350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace7eccfc61404df056700a054df68482d7e06bdd78288370dfb7c84173d53fc. 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/FRZ089800390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb40aca775b6d8c0fcdf622e9ead1e1f445ce8747efd8615561700c2bbd9159. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/FRZ089703170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ea8f1d39eba90553f5261c345c2a4cbed79f5a7015395ae7a11f2a1d104d99. 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/FRZ080000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb4aeb4f8033e71950c7cb862847baed44b5a2302d5e6fad2bc90088fd5ccda. 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/FRZ080000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94d764da575ec52e762a08ee3b2cdf12d12b0e394edcf0293f3cdbee2daeb3f. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FRZ080000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d87e214c8a9d15291b27e3d80a7beb52e619eaa28bce3536870afa2520131c3. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/FRZ080000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a528c6e300853fbf82ed4d0c7eff22d9d5e8e1dd880d16fba078f96f1037e. 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/FRZ080000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36e7ce01d9ff32861ad97a9ab21bef3a3df0aa952f784f7892897d4890599be. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FRZ089905020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e440a998dbe3b0ae40d626175769c9b4f54ba6bb7e3c9308eb1a34383d37d0. 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/ZA41S2300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982d6f1b8fec8a1039b091e1efa7119f48982d878d7987a45f98f967d45e05f6. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ZA56E2200927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa897c7b019fb584f59ce64f60d2fc57df97500308b3dfdd56a1f2551c92b0b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZATNM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afbb0ad6994329af1dfcbb430c3ad84f0ee6811a25f2b91938b6ff88f4e706f. 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/QZMEN2480609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe980b441d4407d8c798945c9638666c88a8504d2f2bc4893eb3ee854adb8bd1e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZMEN2480610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba3518467558eef4b3071da6d12383cc295f240593febf5bf7ad4c42d664a96. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMEN2480611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5340de5ab170778e3e031244866c250b199bad810fd539f6bb3f900bbc749286. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZMEN2480613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba1b101ff5ae4f4f83e6fa9de6256b9ef703efe139b0be56ee95d389b6b1832. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB92378670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7200eee0dc6f3facbd5f5dde98e2b9f3690c0878d39fbe6290c15660d3f490c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTB92378671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a80c09a00fbdf795530bf273972bc7c776c9ad9fde1eee0cdc446de28d301d0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB92378672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacf3e030b2369c63097661cc278e1c85a1063eb0d91d69ec92e71eab998662a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZATNM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad019f0bfa1f5ddeaea4816b19740396fd5bc212fb50e02d56aab1c253cfd7e. 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/QZZ7L2488624.