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 0x41d2d6bffd51f5ae3f607a4ec7c6e2dd601a2bc0838eaca20845eaf62956d104. 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/ef714720-68e2-4426-a993-73fb96c90a00.json and https://artists.proofprofile.net/proofs/artist/ef714720-68e2-4426-a993-73fb96c90a00.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 0x25a4e3d0ca7425fca770aa1dbd67287bf5ed03e0835821a0634dbfbee9dac0bd. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/RUB421200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc2899f1984e1a20e78c294f8bb10005ce167a762bc36ec33b5a726b79933d. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:27Z), 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/RUB421200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d6a1bb656fd2069bec0f01d1e702b49ad3477b47632d2c6c932610f16abace. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RUB421200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea9a2c271fc522dd509c9ca29a5845f32f63cd8a887b8ed2044e83970f3cd16. 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/RUB421200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd547a1313ce30260b7a0183d0fb94ad324fce6816912e1261f53b4ab4d201d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RUB421308799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411d986083e63f4c1ec7b745beccc1b523a838fda686459eb28945c29e20c010. 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/RUB421308802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685f2f155a79dd9429c6e7b53197e5e4e393fdba6d57eb09de8840b5b7e6097a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:24:13Z), 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/RUB421308804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d875d59fae1ea406879ce930ba063e65dd471911c3d6f5c1182b342d5019747. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/RUB421308809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173b7a7bdc8364887ec3f1e82650a50427343bae9c4b6e9f8abbf5d5f7e2dc49. 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/RUB421308810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4e3d93550423178e84a2308552d79fddf341fb345a885200d6c502be5d9043. 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/RUB421308064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78db678abfb5c90a05842c2902eccdc1557872299a8da481f2954d9af2085319. 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/RUB421308067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcd1219ea57e216008febabeca467077b45677f7ca0d2253ea588ac8ef1165d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:25Z), 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/RUB421309138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776685e12a1923abc77dfa3883b8618d6b314666cb44281708dffd98013dabc5. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/RUB421309139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3254bbc531340abe1cea7a06676f752acda5600a7db3754d3c56f860f78fcf7e. 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/RUB421500743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50af860fedb6ac611f26f2f2e2486a0ad0316bfa9ae1d2ecbb0924e7d5026561. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/RUB421309199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde67603aad046551c023d97eb4c644e93cb91388c758249c4e817d06457cd6fa. 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/RUB421600181.
Ток (7Б vs. Конец Фильма vs. Znaki vs. Total)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7babe3f49cde0ca9ce24772ad122db8bec452c9c7b914925709eb116cb506a37. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/RUB421600182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc498fd8306f5f23f4dba8daf2b158c673271b93a6580cc6aa1a648e57cecfcb4. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:05:18Z), 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/RUB421700291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533fc9e37634d646b1249d82459de76b5fd2234b36b75ed6bcb14e1db0cb7f09. 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/RUB421700292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aef8479da172587eb002aedf43f065d5ec85ee18686db81ff0e7597bcc2897e. 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/RUB421700294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb105eb2b832d17197a17c5541cbbefa21bc10476f2084ee3d3afb500fdd46dd5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/RUB421700296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f09341a4456e19a3faf096cfdfed452e721099926bc54d23dc0bc1f709d744b. 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/RUB421700297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc3daac39f18a9d84fc9fa964736db595bc3b42277754479c465e62116d46eb. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/RUB421700299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4249f727acebc3b87fec5f481afba5a0ab02f68ae1bfb1d8cd0ec5a38536b346. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RUB421900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3d72c74feebf8f8782ae142dbcbc7f97de64754778b9e8e6726a41acaeef82. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/RUB421800621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dd3b36e367a9346831d14364ec3a9cb8c951f4c30157f22b7050b98246c6cb. 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/RUB421200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c9d19ad917122ed6d1eb7d3400ef09ecb1466cdc551e325feb743a9b60b785. 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/RUB421303979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77152368251eeb93f93694631aa399473d3d9f6ab45a7d96db9bd3cb141d03f3. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:38:24Z), 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/RUB421304033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2510843d3e9e3ffca793a40a5e57c26582aa7d220defcb91b11329f8af2f2b66. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/RUB421200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73aa50e313b8047e9f7fd3fc24d40e93c718d3f4ff9967709258fc5514b5fa8a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RUB422202422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3395c8b11eb12227eee5cf6ffbfee814dba0018306f6dedcc6aad371bf8b132f. 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/RUB422104168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc156835d43adbed5b2760bc8cac15af08651b608ea5451e9e7fb401b82a50d5d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/RUB422202423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ae99a9886fe02a7dd4bd8976e16d5ff86a682a638c95b8b7917c0b795827c2. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/RUB422001066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a6dd892025518d0d71ceb2fe7d00bdf4ebf51e02c989ab58658eda43624c8d. 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/RUB422003025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3834083be20e1f4a0880de86f58f795c0e72d60415a241ac485cbc6a16090e2f. 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/RUB422303621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65feab9a9368b94e228147c36d0dbc498f92cf176a8c1e4096ac65e257f5f49c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:42:51Z), 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/RUB422403119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2200000849187ad0e214a8584d8239b587d85faad98bd00bade97bb175556876. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RUB422403485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63407dc0ee723587f7630057af018062610ba4787424e08142a48b36914594cf. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:46:21Z), 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/RUB422404188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa4e0e2210f31e40e8db7f226b350d256b2f46464cdd5cd1429ab578d8235e1. 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/RUB422501702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c29e378d9e211e641d604d17fdb65d473f5a03f3b65585718aa02dd4378fe1. 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/RUA582002485.