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 0xb6b2d83fed0deb1e8461d37931dd0f6ee44bfe8f24acb24bef58c13bc0aca303. 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/98dc6661-f387-4bcf-84dc-967345b6786b.json and https://artists.proofprofile.net/proofs/artist/98dc6661-f387-4bcf-84dc-967345b6786b.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 0x527c4d38c2f4417995c2a542581a7d5ee5598ce5c2abb6a6ffb259be89635f59. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QMPKX1828893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce94f20c0c91ece217171c594b2fc7559fd14fec664fb3c7c86d427d67a5a571. 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/QZES61830404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eefe14dde37eb6384d6ef1b182a0a496f73545530093881dd63fddb1df377fc. 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/QZK6K2075115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd287affe601e9c1658ad020a8a9c1a5df39376e47949e34cad1b600a55de373. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZDA42127932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b85154d05089007a18c26bbf6411abe8f738e997234f810a3375b159c99a8d. 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/QZK6Q2149167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3428145981d5c7d283c9245a12fe5aec4857a5bced8bae33dd74156baede10. 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/QZNWQ2191954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de1fd3576c5fc9e65951a495040f6b4709c582a9e71cf201c30f0fe09e98134. 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/QZNWT2177186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfbbb2f20c20c841f2b93a9592af13539238d8844e0219f2adec6cd97115d74. 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/QZNWV2186222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4175ff425e16e2fb6a095150bb8e0400cf3a9cc02306e396d07c78a7784999ae. 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/QZNWS2047674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2d220b5a235d175bcef4c6eed4516a1eb38cb5fbcf3c8ddf8ee4162c771166. 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/QZHN42237466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf39be1bd48eb8095b04c8c2012df02649df892f062af5cf25fca79148f7dfd0. 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/QZHN42237467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfffcdeffdf7c5b0e6b15cd2b250d969f3445c71451b2a369c2a8bd3a00eb99. 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/QZHN42237468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dd1a416fdb224b28a2b2177d931a14bd1e5479a8121d6ce97eb2f9cbb128b1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN42237469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa995b264640ce03db56b74d8581f5acbdaca46f73e42435bbef80e7a70c824. 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/QZHN42237470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadf64bf89ba9856afb7acae10225a8249ea44ead3cbc116fd6200f8a853f081. 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/QZTB52216086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8605db644bd1b7bcc64182d7d57e281db1d9c0393939fbbb6ff3fce463f922. 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/QZFYX2325354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8f26f361c0d1005fe4d51fdf526e67963fa368c7111704d8a06c3b5b1efb89. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM24S2301225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d8a3fc4e40e5a6657d1893ec26a0fdbfd1c5189abb871a2c5705ee77cf3483. 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/QM24S2304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2e27356ebe155e9725f5a6fcd140bd9557192ac1b2deb787ae7abb800f88c9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM24S2304794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903d8fd352bf057b0d48fa922fd52f7258249dad0b0bc299ff128d76d59956d7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFZ32418582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec6c36386f372f18cfc3adbc72dd5150a80942e425fb01cbedc9ccc856b2cf4. 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/QZFZ32418584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eb5b39e3170fb2cc434551addf2c918f0e2f7fcb0867a23f905f7c5ad36071. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZFZ32418586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead700288535ba7b237ac607553568ec867e1399058fa84b241e7ec5f59df78c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZFZ32418593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa131c2da38056ae425edec4ea6d51eaf1e792689950199390cdcc292dcde8bd0. 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/QZFZ32418594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc073a6e14bca16db6fd07c954056b84b869359d84b5a686dafd2350302ad87bd. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTB72408105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ca0b7eb3118ab1333c9cf04d10a13b2b2ac8a4458d7e71de7e0742ce89fb1a. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZTB72408106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7655d3e2a7af74c37fa5d6863413d0f8eff8250a18c4d7cd06542328fc638545. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTBE2426676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8589b86e4b8f0fd8f3f5396d22d481f956038f6478afae7490c2a3e37f1b94d8. 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/QZTBE2426677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a87b4d9bcf2c7a223d18ce62f6bcb0d4e5eb526edf6ab2e0fb466bc9c0ff60. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT3F52517215.