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 0x53d6981ec7bab1439931965178a9926393a0e0f26031d58a345bb922565ef54f. 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/e3cba62d-7eb2-4500-8b9c-e40dccb86d72.json and https://artists.proofprofile.net/proofs/artist/e3cba62d-7eb2-4500-8b9c-e40dccb86d72.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 0x7e86b1cbcf1aa0d831f26593cdde78ab26e6ee12682c6ba2b271057caaa17b9d. 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/CAM371702354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc877b7d7018329af786c8b568bb27e351a062d629aafc16a00514eb694775317. 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/CAM371702360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e06b325a60c0e736de763a6c1770fd13730195b1f85d89cf08a1aab7a01b3e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:40:38Z), 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/QZNMU2149044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25dbd94e34a168796ec6a1a924e55e4a9bc45a7f1e6dfcf46d4d865b0dd9175. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZF8N2145408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbde5f0db21076287a4cdc115709cab09fad4e7b9728cdc2b8fda0486ad3c4f2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZF8N2145411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a66ff58a979adbf511de99dbc483abbca8ce0c737352d7a37d96d6fb00fb89. 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/CAM371702489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4e0607f04aec63a7f33f700158581f113a8c28bea206750d48dfe4b42b204f. 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/QZLL92245560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c81410f11e7a637261ec41889b926beef4616acab769046dad4e4fec1a43a02. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZJG52390037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013672a726484c056e8e52a8edb56d39c3dbaf764b1816fc5f3333483957f845. 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/GBRKQ2341333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029f6054432694eb5e82f979808da9b4a9b7f7bee3a2061110e13b5c85b0b82b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:24:35Z), 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/GBRKQ2341341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7b2bb9875a2316f2376575e241c1e0bcc8a76104f301e2d3ef64825e9268c5. 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/GBRKQ2341374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068337d3b54629a2bd9d1f6db12ac326090a63e706fbd0d6d8fc886d659ab42e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTB92319277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6821ac34f94a2eee547c7ee73a5d5712c213a3e1edf3f3715b1ae0b212b74e1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNMZ2380055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc64559049eb91edffee889e6a331a1e52f7e4ef881c865804627e00548fee77. 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/QZJG52481807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fca5d0d2d565d3e0167d2c71dda744e7d86a6c0854b4e00cfaf195b43bf4b9e. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZJG52481808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a6dd2ae34a482ca800cd25e0ba563f82cbe58bb9e56426752e2abeb3b9af13. 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/QZJG52481809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa350744a4ca0627b50004a4da5def80f739480345f2aab0bc06fe7a6f4708f60. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZJG52481810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7ef8d7ad9caceba64c94a5df123d7b85b279f59a9cb6fea18b2853875b2770. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZJG52481812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c08c280c49ef57d4bce5e25a9acff859b184650100a045bf54d2996a1ecdf11. 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/QZJG52481813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4d7968ef3db94aaff45fee9a0e601c91acd4ee8f455f8bd429c492d99624de. 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/QZJG52481814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe260e606a8332e53cc0868051ab709dcc51b70780ae3edba7e25b817ee04333e. 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/QZJG52481815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce89f4f93a74e8841e775e08c3bf7efb4bb7a93ea45d6ec17a6f6bae5828310. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZMWW2426602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa52f252f6b69544d648b17f42daa3700eb78f482d99fb8c015d4b4853368c8a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZMEM2418862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02674039177f1c231a792c1641bd5531446d3ce5150c9900398c635fcdc71307. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZNWR2499023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82479a48c2bcab220f6e35effb5003db276ba804dfe9617d7929ab37667520f. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZTB22463171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e27cb860cd406fa78910b10ee5e47137103409c81a6b84611143752a0f0eb69. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:32:05Z), 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/QZTBD2401380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53da23ab046a1e359052f1c21539d8a2adf1ddbb48581bc850786ef18c60eef. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFJ2461239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7758af763ff9219cdc0498000b3c56f935db799658756fb83b8b7201524d262. 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/QZK6H2529169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef7bb7ecad0d4395ca4f8ff4f668931f340274c7d89abefb087f787a620d518. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZNWW2535559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9291dbf8f1054fde042ebd992781a882e7bd1665962fc20187882cdad945c79b. 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/QZRP42598019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff88ff19a79bff4df3b10450d0ff00a8b398a319c83b12064472f408c1025087. 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/QZTAU2586444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7790b303c7673d1d1cb267b97398212c1e989f1d1515115b8fc494e991535ef5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:49Z), 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/QZTAU2586448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8355270a5b763897e6f8c1b014b434bdcfb7bf0352df05cf20652d8a09296c. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAU2586452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9ea8e18a45695c860cb0faf5a1191b5b59369d692f684a78e638d406973f65. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAU2586454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b328f624097db3ad58f88542230494bd18985ccbf87e438efdfb4f4bf08bde. 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/CAUM81800217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b19798db8a806106cfbd5964559d9acb1e06207bdc10f52af953ade09425e17. 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/CA5KR1573114.