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 0x8935548389b9139daf4ef68c9bf147af92ac75ab3adab9ad7dde52f681a4d448. 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/f88d424c-0e50-4f7d-adfb-13e5233b04a3.json and https://artists.proofprofile.net/proofs/artist/f88d424c-0e50-4f7d-adfb-13e5233b04a3.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 0x764a99b7ca96e0dbfdee852b77801ed0ff40ccaf39bb4537adadb53736511779. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CH6541800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab2fc572e282e25645b51064eef7a57a5f376949b806dde74a1d53c287de664. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CH6541800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b23bfafc565aebacc32618066d20f70353b6db800dde20876ebe3dc26b51c9f. 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/SE5BU1844383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d1686b5bbcd31ccfb70578300c3ab3cd870027ca4275f0e5143a76efc9eb30. 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/SE5BU1844384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855b3d8ef612328d93aa7705e9f7c68c8cbfa1e1eef9ab3ef3326e822c380510. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5BU1844386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94b807cb1d030f8dd5d9a998dc9afb8ffc0b7cc1804dc13c137605588d8863e. 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/SE5BU1844387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c3cab9e6c06a1379839b0af8c7f5a07b79b291db9b86ead1b9acb28c47c1d6. 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/SE5BU1844389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cafaaa2c6f6df245cbd73589e7c4aa772159e4cdececd1997108c4f8d9d47b9. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/SE5BU1844390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb38b7e88ce6686cc8b882882233b2ec86d0c8fb53f590f7df53fb17fb401923. 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/SE5BU1844395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56173cbe0a2dfc31147115f2188ba9c7a9949430e9ca647a5718478755431530. 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/FR59R1898123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe860c3859ea677c06400bd52f74fd3f6c5a37e686cb5d10b162dd4956563cf9a. 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/FR59R1898125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc427819fc72e525643ade22e7e567bb64e0283e928ff938b9e9448564f95e60a. 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/FR59R1898128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd733c3a97493310446f9a425868ea7f3f0bcfb845a063d61d5d23cb188c0114. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/FR96X1966039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36edbb562d10d9a33886fd534a1f2031f11e47bd7a094a1c692fb1cf7231eebd. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR96X1905762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb058d550a50bcec740bd5ce6c0bbd55f8106d30e90f2a51008a2eabb0c68dc2. 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/FR59R2087970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab84c23c3dfe008696d9e446fab504569d9fdf234839fdd13b4bd5103aacde0b. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FRX872034564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697ee6c0159e4871ad6a9cb32f817b65094cca288e28a266d5bf9e8d33b41113. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR26V2076807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43304e3df0cc98afe0b4a07ee20a710bd58432a84ff6154114bb944e73088cb9. 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/FR59R2104907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436aebfc8cc1a7bdd2ecd6541696698d08dfadbf7124fbec5e97f97a8546892c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR59R2127721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121d79a12f518d875f7a3a1a2900dae8f65500f74246aa99575fa0aa40c07b4b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR59R2127726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bbd1408dacd4fc32abafed6863ce8243639ae8f8e62647d3adb7ebd7b1f04c. 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/FR59R2127727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f38ea58eefce18e2d6ae509354f0a064c0c8bcebf88c10824239a9d62f7fcf. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/FRX282162899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4062e2d9425f9774ca112f0103aa9152796adbfb18defb2da6fc6d3bc0d569c4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FRX872113868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f36f07d08a8866586ffba66e2a770e3525193f82b5f5487db4315df7a000ae. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FRX202212683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa603c335d2d875065b1e4cd9d2364e9d67b7428c2d232e44137a79889d96c7ce. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/FXQ022304270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530dca0c84431dca00218d7abbec546b51902d5c25b046996d538c5bdb3da5ab. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FREM72400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574b5a07f032137ebd3dfd61d0412f1f6c820f7102ae7de36309887462ff27e9. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/FREM72400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae90ec266189f94009b64687a7108651806664bc2ef3f2cd936c3d58c16b3001. 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/FREM72400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba815e1750a002fe7359a6de0c7e4ff4878eaef32ea8f972765373ee4ba5aab. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FREM72400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb602c996faa9d3cf87d0e16f4aaaa6a8422c57639669c26e6e12a2da7f9ad06e. 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/FREM72400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cea8616523b416e210e33130324443afa0357a7d27bacb058383dfba71365cc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FREM72400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0c7d705dffa704e287a6b479943a1827ae2390d5efe842405a386338c97934. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FREM72400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d4cf832c520ba1ae266099dd9b60a4e94299f225853cf13eacdab39f8f8a13. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12362175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d4cf832c520ba1ae266099dd9b60a4e94299f225853cf13eacdab39f8f8a13. 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/FR9W12362175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb77d49398e27419948830b06a40b4eac1a2dfc039b7ec1d42642cbfcace7766. 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/FR59R2224346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4da6b85f381e26d6a04da842c37340f300e7cddf2fa1ad764b8c23d60415ab4. 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/FRPZ92438420.