KLS may stand for: Kalash language (ISO 639 code: kls), a language of Pakistan KeAndre Lambert-Smith, American football wide receiver Key Largo School, a school in Florida, US Khitan large scrip
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 0xb3c6ac0a46a5dd9fd96679400e6b9ae5855d12aef5ab18ba79a5879fe8c96d24. 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/41f35493-96a8-478c-a483-ef89b64bca89.json and https://artists.proofprofile.net/proofs/artist/41f35493-96a8-478c-a483-ef89b64bca89.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 0x683c06c4f951d91eb084fda0e199092e63de308bdd3fa840925fb117f5539a05. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FR96X2286578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc605a7cf113f85743560d4d3d74141980bc0619b256333ce329ceaca9bef28e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FRX202201657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a17f4281c649a930017bd1477eb6d82fff79c51967b214b21ea424c8493815. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FRX202201924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d7d25e4cf08c5b4de0515ae29554b92021eac31d829caab45060fca3d8d3d3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAGP2273953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ac7c00ef85521a0d8311a2e08ec39c2a9b8239b1d669f046ac1b05093a37c9. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAGP2274072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b84b98fa46725f1bf7f093fd16985ae4b81d266feb04ae9a8522c17690e067b. 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/TCAGR2230347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af9ef23fe65e60ba2e44dd0a08d319a8dfa83a06a898092e8e5202354cf2396. 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/TCAGR2230321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706dc6517bacc07340c090b6ca810da1c771fe987c261f077f3bef26832507e0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAGR2230324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca4cde0ab8021f66e7c12c264f4026beb642b7071161ea01f2016ce15dda939. 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/TCAGR2230362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5164e88f6b8a98209b9945ca209738257c5dc6cbe8df7f53d8761f348072b860. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/TCAGR2230384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706dc6517bacc07340c090b6ca810da1c771fe987c261f077f3bef26832507e0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAGR2230324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab16b626423e06f8080b72d0f5cdf59892dedb98f0deeaefb83eb4b6be28eeaf. 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/TCAHA2393773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e990d24094211f5d8c34eff68764fcfd6d1abeb2b2b86bdd4a629c8e0cbaef. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAHA2350541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbcb41b2984c6c9d300e71d36b42ea5af099d8a07dee483d9bf2402df4555d2. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/TCAHA2350557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2180c2235c4a3fbd5feb8581667950bed7a862d274da55cfb67999dcaca825. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/TCAHG2396241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41efe16da62ea444ec60056d572e3adc8a08ea6640cfdfd6fb387497bfb2ce5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHG2396303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a614a5e354d9138d5e88a97367081622f9815f210e8f9a7fc41be090b3ea7ae. 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/FR9W12354757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f12e7df46248937e00aeadd142759be7651de21125e06e92189e677a64af32e. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/FR9W12354759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3a83c9af1caaf9173c621961c5a60ac394ecbe72855577488667dc06d456b5. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FR9W12354758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ced2a14486f7b93e3a1ea6ac7620b053e6438de96854ae28fa00dbf00a779da. 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/FR9W12354760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba8d3eb2ac7a8b9e261a2114fad5892515f9b7b927fc9bc71ab1f5e99c545c6. 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/FR9W12365066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f88344ae4581a99ab507713c2e8ad160f23f574805c2dc33e97a08ba389c5e6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR9W12365067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8171adcf515f7271d9e1243a3cc3692a40bab3648f6599085a31fb982a9d603e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/FR9W12365065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e649c7e3f1177d84ee4f3a668a1f3a38e28e579b78de0a372667c430d7b90d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR9W12411189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc7576fe2ec14b17db0b848d9b8a0ac5f856762f38081669220b5f70c290cd8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR9W12414305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda94983e1ebc27578d1d63c904eec08495a155dd061d9dcf1ff8c40734af15e6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR9W12414306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0a4d1a7ef4558cc73199241b728e7b2bbb4abe3a7827dbead47d3834d0bbfb. 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/FR9W12414307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443011f14b71e3d2ddfb1a456eb98ea11e5e33cc80a85614ed639a2c196d656b. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/FR9W12429278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d4cb7462f1b76f3b63da06dfe716a55d2c07a3a2e84ca9247050f9fec71976. 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/FR9W12429704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31917e7a9660ce4d64b9f7037c437d482e6c103b4287225bdc78b95435472d32. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/FR9W12428936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4823f80be6be6db1b94729303e49f6a31594f18a4510cc1f4fd6ebd7232ea1e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR9W12428937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9478227b2b93440b73a62a3ab788818dbcfac096d8c4881e0199e508dcebf93. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR9W12428938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7a0bd4e552be68eee10d95b3b83d9a031427db41dbc542a8e34d818c7e7ef4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FR9W12428939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617c4082d770886e873b3d6bc7652af03499bdb7d14806c4ab02eb8b8c4557e9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR6P12500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3a9d3f49c750cf678e9f65b6440fb2564288ab6e8970bcfc3e533b3780664e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR6P12502060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7db7bc9e16cd7e84b2121c0587dcbfd8a265fba96eb1fb40138bed2bd89c579. 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/FR9W12421721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7db7bc9e16cd7e84b2121c0587dcbfd8a265fba96eb1fb40138bed2bd89c579. 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/FR9W12421721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c5fdd058c94bd8db3035c927a18a07e94ed13a486a4530d8c32d2b0aa7ad2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762125260.