thumb|Identical twins can be difficult to visually distinguish especially when young, as demonstrated by brothers Billy and Bobby Mauch. Twins are two offspring produced by the same pregnancy.Medicin
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9588580311cd2d6a14f0e653b42f4a66ecad455422f3185157981aa4e6de22be. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a24b124-763b-4a60-8f03-230c0e9fa0c8.json and https://artists.proofprofile.net/proofs/artist/6a24b124-763b-4a60-8f03-230c0e9fa0c8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4845ee9d756a8172b66841f66c1963008ed5c5509c6d91699ff20cb53403d5. 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/DELJ81352531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd208aa76a7d7af8da6e469c5cf9205a33421f941fbcb3a1a979585da21d4d7ea. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:10:24Z), 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/DELJ81352540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf00fa576c6df2425fd2b5238b21ece6a79185c831e4439a0130cc08b5ab6ff0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DELJ81473601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31632cd7505d635736fe92409417462b289e96751d45f9a249e6b0e80c440ba9. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DEQ121426709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff0491995acf4666bd7a349f21ad20c7e5ff2889076cd2dfb5801d25e72a25a. 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/DEQ121426710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934f7db36f6ec2d724552be86090b7b5cb0c7414d248742621fc6907e100dbeb. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:45:56Z), 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/DEQ121426712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed850e90bc30465ddb8dbf4bfdc07bf4778bd05e09311c2d119fe59a2e3aa022. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEQ121426715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fdb574a3dae73b87eab9278f78f4e47d837d8c598add5dbe864b35a62ec856. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:16:40Z), 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/DEQ121426719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98ad8a9357be63d4a92124fbe8ba6c1eba9a4f13e4d2a6b591dc4972c2b78f4. 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/DEQ121426726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22709c427d747110afd50ebc14e9af364479fde5a967ee13df87a87cba5e7ad. 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/DEQ121536697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bc951e83d3f85342e02cf85eeafa6230d235c86c23f6ae529cb07d58c4dbea. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:09:59Z), 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/DEQ121536698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5888e15f53bf01695169f966b98e6edf9f5af2333c5fa037130307732a36550b. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/DEQ121536700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b69932cc6b7c2fffcf50674522529ef7391170db42fa273e68288cd14561b4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEQ121536707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9d26b7dd031f94a40144a36b279d144a06c538a836c20b347e9408e824a66c. 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/DEUE81800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a59a2c286aa003e42631614718c5b5f7f6bfd0d28b891d32cd8eebea2457918. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:58:30Z), 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/DEUE81800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c079d6e73c8d9594b75bcf802b57ada6434c5fd359ff5845ca7515bf80ed50a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/DEUE81800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee68911dc1c77cd036151cafd9c8ae6abc02ed901bfc39160d82f24ef9a00f3. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:19Z), 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/DEUE81800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204d74c6b2180867cb701ff85a86ea019abc602784cd2cb506d90e4aee588a5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEUE81800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747af443ff35ad865d953f93cc5877bee7cfb501df4b3787752db8af55bc9034. 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/DEUE81800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bfab5debffc00f7f4db0e5659b34859c758cf5a28d26117c4ed26676694421. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DEUE81800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fe6c8f439640ef4c7b3aaf220d76e307863817d17cebbec89a254b520aac6d. 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/DEUE81800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4177ca4fda1ed482d0739671ccdd5a0cd2a267ec4c7e5c06dc2e4cb493698854. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:17:12Z), 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/DEUE81800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebab9c9c6b23eeeb87a796c4d9074b95b49d661f46f1de3293fdb50160abe198. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:23:15Z), 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/DEUE81800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4fa1d283004ca80290e3a890973f9c3e60c194c1b8670a3b20d18e1c25f7ed. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DELJ81822957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782283e4aa28bdae5b83ca125740bb90f95bc24b0512e7c1fe45c85e666ba2ac. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:07Z), 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/DELJ81822958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e9f7b73f4deaa70c1a4de7d10987846522e1e61f69aabcd6761d36a6b8b562. 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/CH7812195606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e3479b2d9c62de9d992c7ef4ea125cfbd75dee81053113173a1d02c54c72fd. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CH7812196527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5a406be4a931899b61b83689e92accb6caf924448a3becdeab46670346da5f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CH7812197647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe54b45d1c19047305a4f4de80d3add3992a0c2ad0947036685f5dfad903a0e2. 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/CH7812198132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38e700a7c1d3e83e77a2d406841858848ffbe9758e35e172347fefd06545c2c. 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/CH7812198827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca96a8687d1f449867f9d898a86fb008df1d14a1e5ffc7807b67c4adda50b5f5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CH7812198828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20f541bf3e3175897ffc6deccac1e46d2d613a7cd33015c65f71b8ab0ddfb46. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CH7812102574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d809e116b15e2f83a059d6dbf9c7c0c892cc221ea9d4eb684459d64b784e0e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812104411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e5ea060b047fc906cae4f11eac8e938f5f9729c4c10468193f10e7f8378d07. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CH7812105444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3f374f480578ef9a3e132245082538b934400b70ee7f386044775aef98eb49. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812108075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290a408d29df3239a9a653b4c8c59283f5cf928d1b0283db130600fc88cbb270. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CH7812221362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1597477d93ebb7db31db0fd78c938a9b7c9148569f0a477c516752cd1a6a9f. 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/CH7812223048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612608cf6f02fd303e5ce9c16fd168ff12d49b3cec71cc36cbd414366f4aec44. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CH7812225946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8c496bf297134a7663dc542f251f9539aa2cbad3dcc1c8bb7046cc869851ba. 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/CH7812233187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aea0f1f751978a67bfd7ba9502c3a698328e5f57d5ccd0f06c8d43bb26e48bc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CH7812363021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9471fdc9784bdc28ddd4c63dd56a54863e3a913c92dfb8150d752a5eb8164a5f. 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/DECC20300910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0fa8c0fe961b62d3663fab2b4069aef057f3f884c0b72ce880adc06793c614. 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/DEMN91400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0fa8c0fe961b62d3663fab2b4069aef057f3f884c0b72ce880adc06793c614. 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/DEMN91400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ab61ae874d94c117f79f8ea1003b60a5122c32d0d3feaf983450ab1050b273. 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/DEUM71800269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a51c3d6130729a79728f9d9c93da92b4a3eb86ac5acdff60da28c8ec5c5f1b. 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/DEZC62279833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eef1ee94c7d94b834a888df3c23c360f753efd165fc3d00ba3e3e70ba31c914. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812226111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c04bf323f13456bf1da07a7c388a83e87da050f5cebba2f963bff5a1285cb1. 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/CH7812222712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41f696e039994235767be8e955d20d550a8714b13b638da209c918e610987f2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ121748420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d06a45f2d1e3acafd17331def629d3df1f6ee7d24a69cbe854a4ac65dac8324. 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/DEQ121748408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10afa29e49fee4365e679b54c7866fe62cee75ee7f3b7882dd692d1a294fcf51. 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/CH7812365877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c19621872ae3f5d2bc61a797e8aa1af1a54d7c19b3606fb1ce87141a4a15960. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812071067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b974f95eae280c1b8aac9afec305c0ad584968ca8cbd078e3b2b3a77a7356a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812053568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ae24d26b26ebef14596f57d23fa60d7dbafd8b55e13803cee2eb53c1441c13. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH7812053570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c80181ce147300b15ec3de8cdfca6dff6980e9985739b876889e80396a338f. 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/CH7812053572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204b78d85d5a63f9990319c10f2a1483cbf17e0d8ffeba65bfc2db5342b61295. 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/CH7812053573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3827236f8c1e2a70b8b697a665d6c3a004044212b2dcc9e0f0ca8f4b64b7c7. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEZC62122805.
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 0xce7cf97f565f5d65ca462c5b31e8f8a3b6212c650bd76aab7227f663526b0e7d. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/CH7812052851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7df884ee1011e78e9c95f703b6c17d377d60d2a51890921ab295326f2f95a00. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CH7812053571.