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 0x7f3ef904b8ec35187b41e20d1f292872bfdd0ece04a4e32d033453f392dc5003. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75369637-354f-4518-b152-49c58de1505b.json and https://artists.proofprofile.net/proofs/artist/75369637-354f-4518-b152-49c58de1505b.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 0xe85e1688d510c1d34a78bf0b07fc0c51dfd636724ff5244e2eae0915077f5e05. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US92U1904454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279013f5d27766eb8af0b7ee977a34504c43c05a28f800a4d394bf4c7a040287. 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/US92U1904455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafe3f9de3ccb1d30cdac1489f46a7128e96513079b39e97e8eb525db97a9e26. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USY871500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8784e9d75388fce27e151ee2bf7478852932823c7be1315973334f08d59dffcc. 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/USY871500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422326c7e2c48c0652c1a945789a22181aa0293d0a878eddaf95ae58177458d4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USY871500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1342952ecb93eee05a653d46cff2dab9d627d4009e7e007f5ebb77e2836e9a0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMFME2337620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18f177865c41a7588315feae160486eb275440d480076ab09b184f683eed051. 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/QZK6L2336659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8984e60529b232c44198ebb1fa76761eb8ec23f08175f0cb0e0d3cf60a8dd2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZK6G2279714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef06951a0ed197cf5ab0ab63f89bf8cffa52e23d177da3fe2cedcc215cceb26. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USDY41560288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0498c2caa30f326b0dce5f4bdda4f0b3facf15920f0064991e8e9b7eea8fe2. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USDY41560289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e78432272225e3fa489b1eb584c0f6f07bec5785079511cce6a35282da9eaf. 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/USDY41560290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c695006da9bd53f278c249fd2ad7b1b600243386a2c0638e149e68358e13145. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USDY41560291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b3402954510342fbfee67bad21455822f022b4a1bc07636a2ed09d70d19869. 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/USDY41560292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0221082067f7a3771e5f9da1a3a39615fbfa649452ef3372b8201a285f89c5f9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USDY41560293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36427a115bcfc41ea1dd4d4904087505db21df147d4b80575be8230eae829b28. 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/USDY41560294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95bb99447e0eae05f717064c06799c97240fddb129136eed1f0fd8c527f2006. 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/USDY41560295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5854ee78717b74def7bf101a69b70a51cddb2b1f0c943b13b06fbbd3011ecd. 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/USDY41560296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4487d612cebbd49b29c4f5855598c77fdcc7bfeabad15f68f99e138b05ad145. 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/USDY41560297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13869ff0d34680d18761184d10f4019a81462700e4d04469204e1005263af56. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USDY41560298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99de74bf6fcecec74c67b190b61ef30b7d9fdf6c8b60261647292c0d5f2d1b2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USDY41560300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7514119085ae199900e38e1bb00bb15b9b92e6af3cef929359766b5c3c3bb9. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USY871200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61737716c3a026f71df0709e9419ca61d2169f0c2e83a586d47f858c753afca. 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/USY871200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17c1fc7a5c23c0e35b427064dae4fb129e494baecc96103116f52392365ff2c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USY871200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f56fd8048808bb91ef9c8204a695d73b76c56ace17016897c697663c6d3c34. 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/USY871200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1cc5767ccf330bb0314f53b9ce4cdd213a98192483bffbc9b9bbba46b2fe2d. 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/USY871200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2135e3cb4f8a598b6342f84011a372040c6520bb0c94c8a1618340973316c49d. 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/USY871200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ff1e02f7685424a2a1047f81e5b152eb0f739fac533caefb4f3fb10dec913b. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USY871200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae26f72ee2b0fd330d1bb588a4aacd3727f8729234cf6655af955682eee3bae. 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/USY871200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4210c03e4ae9272cb9bcc9be1337bb2cf83d9b77ecf923ab0b2ed7597641e7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USY871200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e609cb5cf13d221ca0211cbc39ca3dd23d16d13a640e2ea9727bf5d8255f99c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USY871200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9da040da715b58db891abc101423ba358813292fb92823527d18676fbef7ee. 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/USY871200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc2383b43acbeb9b054ae5772b184e7d43af5e358276bfb81d933d93f753d65. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZSYP2344184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca5e97c06b02d17d38c1d84dbbf19f7b50ad25e7c739627b7d9b6387b255d15. 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/QZSYP2311471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca5e97c06b02d17d38c1d84dbbf19f7b50ad25e7c739627b7d9b6387b255d15. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZSYP2311471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261caf918495e024d52d8e6443380f1f2b815a33b31a9551627cf06ebc41a45c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USLKM0900012.