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 0x62a3502c2883c7611d48fef15e0551ae1462189da28bfa190b7a14ab49f10956. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9dd4fef-b28c-4704-9c7d-5736de652099.json and https://artists.proofprofile.net/proofs/artist/f9dd4fef-b28c-4704-9c7d-5736de652099.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 0xcc24639fd3e7a85e308d106a2d19ccae5db51b9aa2a1af0b69b8f774ef164504. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTB22416983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4766812586b653cf0d6d7f8cd824a484bf346e8ef9daeaec57a1bb5eb8d63e. 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/QZRP52150284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7219ddd7ff682cbb5e356d9129bf4c3e2334707935fea7a080e6f046a3f3afd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZRP52150286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfb19fb845c2f4d98e852dd1ab3d8cc18662037e0069ec2243c91d5932ccdb1. 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/QZRP52150287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7797e573ad70ad4d12ac45ea38db93e20d36d5f3a26e01389f1221600e8befff. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM2PV1712294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc047cba2f375b899d098dd9767d8adc780a3d22e7bff3506e4ec7e36fd2d142. 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/QZHN81975797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6fb8f2a527e8b21858044b7b9896ca81ce72b3b5d5c89190d324b571b7ed03. 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/QZHN81977139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44801ef170107bdc9d9a5f824fc600a9a3fce4d80599791aa4a861d6cf1c5aa2. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZFZ41940196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb03841f25701dc1d9b8f35a44a8e4ed73de592f21df3c24b261bbaa3f4a3e8. 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/QZFYY1950947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502b71a9ce9aa51400e46d5a006c3247c552039b22ecf98dc6c63cbc74de643a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZFYW1902876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4474585c7bcb90ea0f2e827f67cc390f2e08498744686f4107d54be32988ad7c. 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/QZDA51879116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2db86c21723698278800a22baf2d3ea1413f6336a3a1a45f3e0aa913357dde. 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/QMPKX1778971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120ab42beac8a50720692c0e4d064e81e6a065c4ecbfeca583b5dd497ee63858. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QMPKX1778972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7abcb51a2010149f7930f6652c8faf1bb68cbe2da5983d44d593c1327d13bee. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QMPKX1773223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200d58bd141eb7f51ce09c7c9910ff9d4f2655d01952fd2831ff554c6ebb8d78. 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/QM4DW1772908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4efebc960a49c2209a5976d9299e49c0676d7f5ad956a7fd84f88f45ab1cb0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM4DW1772909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1004d4efac8e1b8e267ed8b4c85beb98cb59219508badcbababd4a596c215f75. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZ4JJ1745950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8e80dc4a1986962a765fc7b2f271310ed30837dc7f99d29bb6bb0285bad91c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZ4JJ1745952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f451eeea155718372c4dc4c55e89fbd39f2c093529c1373f13c4b4582498e3. 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/QZ4JJ1745918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e545802fc7dfc818f577eea83aafe1580d3e43d9624c1a0fababa9f0f3945f. 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/QZ4JJ1745919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537ff72a6bd0fcc3f9b0efcd63f518c78b5cfe771919bbc137fbf9cc74ae67e3. 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/QZ4JJ1745920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b71218683314c90fe8e7d0e8a583b2adaff1ad90072e83313afa395f849ead4. 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/QZ4JJ1745921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b3064e141d93f42f6dce25647e2514d6dec4a5330930b95614120f3b32d3bb. 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/FR2W01200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a3ff8d9e227355ed8d8de1cd60bdcf5279f75f37d01683a6c325f677903209. 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/FR2W01200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe37967fb339c5e002920f4331b2c19993e0942a93b3ba7566dadeba28f56acf. 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/FR2W01200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd8d112315faef2fc4ceb783f6543b0309f81e26bf0d17029006319552416f5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR2W01200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4d2fdb3a4c2b59f073050c53c26ad6316de537a2dd3bf14c8bb31a5cb07422. 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/QZES72538047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cb75718d4115fbac69de42c473a117b9269fb3bbe0cf6fc57a3bbdf123389e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZES72538048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e4bc5a1da815563b023e62e84c2d9f8d212d86f3c254957912f1c3b94e33e. 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/QZES72538049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d279578f615e28812dd88d22a4f6770a635980e51ac824701c9f05193618ac. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZES72538050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd0b8bcfb1e7b2fc6aee83991bc068bb3c63e1c6da014d9eb31c986b82a61d9. 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/QZZ7V2493051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9527a270263f241333d6501b7645fbbc754765ca68c9a932d31ffd7eb39942a8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZZ7V2493052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9376155b04a9288cca732ae0d04328aefa6f1e887eda5a4288a6ef797e1dc84. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZHN42348075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b44cba65ef2e84b16dd5f8f2a475e4219c05c8188c5593ce573ae6547d0231e. 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/QZHN42348076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ff1e0810acfa881b7f1959593b7615ffb30629f238ca99c103319a077bbde. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZNWV2588343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c18691eb41050bda1e756cc5a7ad11cede7cef8c97797424b4aca0c3c23b654. 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/QZNWV2588344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e40279d680a40f862f9940cf667b1694633621b3684744e73067426c3438f6f. 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/QZNWV2588345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3331fd7e9805f9e48cffc758999f31bb0f0d786152b6c451c321f714fe8e10. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZNWV2588346.