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 0xbf4c7d46a9a4aabb6efc1a99e142a3be632adf5df86d68e79e7d9f0da7ee9ab5. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/212ebc65-f9fc-4c68-956a-cf3bcfc4c3ee.json and https://artists.proofprofile.net/proofs/artist/212ebc65-f9fc-4c68-956a-cf3bcfc4c3ee.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 0x1170dbf8495644ddd867cb5634e237ec10a33673b597ff0ddbe38c9d02a16614. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ITFR82200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b7a9f7f68fedff038428f3d52b2986eb82effa0c17c731513aad0b24b71d34. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ITFR82200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa231f6c4aea535a12f2ad80f90671ce7128a46ba88c6147bbaebd8f3fc3d6178. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ITFR82200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a56b6b216a80c109afd8345a16548bed411d9be6d0963f612b0c9d541819439. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITFR82200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87e61b79f8b3275b3c3cfcebe4ca424c945dcda05ca34116cd6d61d2fd29270. 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/ITFR82200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05d16f8feda87597a2ba1bd4d706cc7801754318722ea820a43dd5de893174. 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/ITFR82200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25023e006161f7b2e71800af227963d0e298d843222384cee0bf4b8ca1309e96. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ITFR82200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070cd7a57e5dddc903475a43df50ae67f8995811f73107d92d8ed309f4a8938d. 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/ITFR82200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a12c34b0ea0099cd4dc93911188c2612ea2aabd0d6d602bf3b3483161ccb800. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITFR82200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad2e4da43066ac3f419cd2c5e15fe091c0c7b92d11a9c09727046b3d81daf0. 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/ITFR82200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79936e16cc373d0faa7c8b70f3bce95f998d5ce3c23559ce3a02584536f2a1de. 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/ITFR82010054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf47b4bf0fabb739012c328d53833bfe2babbb725480ddef3380b1d363d1beec. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ITFR82010053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89f0873fcd4613a040941d922d28f703b2c982ddba0bb4e059ea38642270599. 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/ITFR82010055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf26b0eb4dff633cf758d528eb399695d925b84e6bd06b1e8cb8ac466c05aa0. 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/ITFR82010056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3212847d43d15414c793f69d2e6e9252770b3d9239f4fe031711a0c20693870. 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/ITFR82010040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe965b22f47f12574ddb89af665a42416b878f9c51c174e1d4b6422ec75c0dee. 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/ITFR82010057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5a4d933e7b361d08aa484ce6048c42eadf9140290a151623c76bc0541f3f1a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITFR82010058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab6364f5e0dcc03b64a6f4bb12536ae6a2943f33bec0a489c93ce8ce70d4cc. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/US39N2302979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcca7e0845486b6d90ba86dafd6e915f1f180c95a57b16ef20ae31410667e503. 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/IT7SU2100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0328b57e267f1cd06a64f0eda5a51fe253f18add3bcc9be03ddd6480c635b5. 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/IT7SU2100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa175c92ceba6845c2fb9d6b86bb92031285f82512150ddb2a94237b195df32. 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/IT7SU2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895366db41b5390a4855776524f407e88b32ded3c92afc802cbfc3ed0810f36d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/IT7SU2100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d5b92db3fb741e22486680dc7411bcfb73fb2ce8c3bebc93295994846e713f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/IT7SU2100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e73fdfd3b670f7201dae0154331843fc32cec1a7c0f9307636e1477b0bb65d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/IT7SU2100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b2592141799e04e0aa1224c7da90eab35c46a7c2029b8685a80a963d2a06b4. 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/IT7SU2100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ac2b9a2d032bb953fed5445d2b19ebda20498a43625b3b3b64dba19de0c073. 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/IT7SU2100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed3b07952baf4e3f0b5e8a912c670e8e10b239747df072032ed51805751b774. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/IT7SU2100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef527b6a31d606ccec7f8645e1ab51bcd88e2ccfb8de679debd0eef233b74646. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ITA642100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32352a7efe6c45469eafecd909454613c766b49b5b2568965ed24c92f83925f9. 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/ITA642100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc311dc8c0211ab40beee7c9793a650600cb0f503db1dd0afdfc866ef8b63159b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ITA642100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bb91e72b33927188ac7575c3f88a8653415f163e023765522e570794341108. 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/ITA642100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aabca1d3d01705730ade86f8188945561b2c6bda891b39c224e2739fa78f56. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ITA642100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f36fd9d968cfdae9a1b9a610e01b5e52a8e7255b9afd8a33a4bd0f183007f1. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ITA642100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9769c3817990c3fbfef27d9061f0b0a3d66f1a5a6eb5104093a5683bbb5f0339. 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/QMFMF2012035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81f679db60f2b4bed69ed5611b85018b0ee4c5f261fa9ed5e239afa52ad8259. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZFZ32085829.