Nok or NOK may refer to: Companies and organizations NYSE stock ticker for Nokia Corporation, based in Finland Nok Air, an airline of Thailand NOK Corporation, a Japanese manufacturer National
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 0x2330e95d00d546ab3d2b4ee2a171b8298b9b2f518896a2e66ead06ef22587e2a. 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/b67775c4-19fd-4a5a-b263-d5991cbe3b42.json and https://artists.proofprofile.net/proofs/artist/b67775c4-19fd-4a5a-b263-d5991cbe3b42.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 0x2ebf8c33754e87caf7592d4a9d26dd5ccca8240b90165ab8c5663ebee3d0d665. 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/DEGA21200637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82713bf57268beccc9dfa5f0723a6083713c1ca2f8662f68852a481704e97456. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEGA21200680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73e8a098fe1aa8ad6b80d19552a50ea0870c77f43652d3d8b95cd9a92125f28. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEGA21200685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f76f41d66b7b089277ad500f2b7461595fc183dd6d857f0e33ec3d046afb8c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEGA21300909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a31a1ee3f89af0584edf72193e037d5b1d9e1e98151e55a94a289ef2c85d6a. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/DEGA21300910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763d2764f98c002c910654ee143da2553bd201ca903338121d23f3dfa77e7588. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEGA21300911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1c890545f416f9bd801ac30434cb15f0cc64f9dee6c3b5ab2bfef25348b0fb. 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/DEGA21300913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd4ed7a280081dfe1f88eb6669218a2658a274936d563c991c1d4c9f295ad76. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEGA21300921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec30df242d418a0dfc34d99aa301c5075d40c63e04e43b8ee31f6cba88decaa1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEGA21300929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf55676f75a93e04343a1086f02ebc3d550e73714ac533e23ee0a40122442718. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEGA21401234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56989633a9ce73740fb10e587737c8ef033d7f4cb31ac4e609fbcb3071c72d6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEGA21602235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652a0aa7779590284cb422d72999123752b5102fd739b5a4d7cf164135525e6c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEKC41200214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76042e1eebe1f08477e294d35c1d66205be8962e60afd8f28ca4cd9e0af1650. 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/US36T0630211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff8fb976779b8a2d48cd2851e13db633e6e9ecd64a3d3f940e20aae3c3b9c1d. 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/DEL712000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b955c71c45e5e7ff4a739f80f1aab3c683434ede8fed6df7ab8dc0eb83dec9. 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/DEKC41500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22d66b492dc794fc6bac5ae44a260543bdc651aa4ecf605587e15df76579b6b. 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/DEKC41400199.