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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9128dec53232ceebe018901df8f1b963add3cb617dd7c1d9008fc633e90be8. 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/809c8bdb-e75c-4806-9209-45fd16bd5f88.json and https://artists.proofprofile.net/proofs/artist/809c8bdb-e75c-4806-9209-45fd16bd5f88.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d02fe5acb7906c20eb09bfb81346baadcc7f6af239d81107e33023aaa3699c. 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/USANG2003994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce672127a7242669a1701dd8125d37eeed686706f9152b4ddaa4f14d46dbb8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:21:55Z), 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/USANG2043788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516c3042162c16b93c01b787aaec4774235e28bd002522301d5c8d786c3a5b46. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3DF2063940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641d4136ddc2140e8d937f95aa01734b6531e40885de91f420bd1e7c0ac2adcc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2064030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2923bee4a2042cd15f7c9d2a85f026f2a14b35eed19efb393564b8649d28091d. 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/US3DF2063949.
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 0xfeed6a4486b21d3c6bf3e425d273e2fba885295be19a869ad8d84b8633d7f98f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US3DF2063952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3382b92f0521617a9cbede6df4ed1f392fd68ddefe81409a1a37f3c71f7df0e2. 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/US3DF2063996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b55f9a4671280ca43674971ad68d49e085b88bf071c1d69d9d1f22881b193ca. 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/US3DF2064000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc20501a5f1ca2f732a4a319526a6043d3c40fa20f7a7f78e8ba2245d0d3581b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US3DF2064004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3605020ae642e5eb95b34b0317c57e903c74dcb0c78684a5f10b6e966c0e8fb8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US3DF2064012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2044fc5c10c7c1acba2af143ddfce68235f48720169aaf11cc63554a535dfc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US3DF2064132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf231386860b0fb1bce7ca765364d319ac288b2a07926f52217ebacecf4bdfbf3. 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/USANG2128400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67b474e66edd86f70b04eeb8c5273fcf58fe10c7f9f27e1cc842014764c81f6. 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/USANG2128401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8927a6faee3c5ca2cdbb2fbf928422925b42615128e78d508634ed57600d930. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USANG2128402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a5fadc3b5992a3170f2b948312ae898bc25d449389cf5475a99e4a6fc6eda9. 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/USANG2128404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dd606ec06a42a9a7c9f38bd89a1ef57f83b5aebb72d2990bad48a619e084f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2128406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550d615e60fddf98bf88fab19de6db1bbb2fb3cbb04a3f6405323e74c1186e94. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USANG2128398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0c0c60866f7d94dc8e16522cb3f04a0d16a93ad49d861de11e9a085ebf5adb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USANG2128399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6c586caf921252666af4bd1b845f27b59e41b0c877c47c1ea312bd42e229d. 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/USANG2128403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f994e5eb56bed40dabc2fc404e323a87d3dac0edef5863b0ec9320bdafaf9d7. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USANG2128405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e244f423d38b7e097b2c8159bf86580b5cca65b10894b3316031370d6fb5ae9. 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/USANG2128407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef6cc52616ac1f4994d4ec95bff47b79846d704df8acb68df2baa3daeae4507. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USANG2173776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9759264e526415c852f131184f70aae37a47bebf1af64163222e77b929822331. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USANG2173771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48934b3312a0c8b809fc332fe0737882b0fad4447782b0b5572e28bcd4d7df4. 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/USANG2173774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b768d9fa4993f78d56848e8ee0e7d8760b20b4352697a92794e88a2b26d2ed7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/US3DF2102387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6c5606497c4f4d67aaf8c3d4ea19fae88ad684bd8bcf9f2c14bb3f9c9cbb14. 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/US3DF2106031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03665284011bc5037deca0e533a502c71114ffe6db3e612e905fd17714b863e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2106045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631df444549a0f519a255366c416a25830d8201ebaeeecc732eea0fee799f75c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2106048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995eb1043664b5c8c4c5289c8ab33d3a165d74af4273403b529edc5203fd20f0. 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/US3DF2106073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691e8f9b79852007e51d8596dba96c941973d0bc0f599bd543fbbc8200c7ec16. 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/US3DF2106075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231e01126953bdd60e1bb95f1d5344aba97a0dc89efcede8f2e04acde34dbf16. 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/US3DF2106046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0070de531df2b6fc13bada93e0cf0d9f778a0ca14e6b092f36706997764e92. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/US3DF2106072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d5d02971db5157c2748731d6d189b26352e659d4f42605e6233a83f5c35c3e. 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/US3DF2106074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428bbb0c16ebb5118eadf57ebf771033d161796132e3d71ef7c02bd1b666e0c6. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/US3DF2156143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428bbb0c16ebb5118eadf57ebf771033d161796132e3d71ef7c02bd1b666e0c6. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/US3DF2156143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09c206ba85e3b3b912eb12fc3f99da87165a8cfebd2c1e46ac0dc579c8ed2b2. 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/QM3DF2148162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cebcf1e35433bf42e869e52769d4ed7c91c034c189f6d1acce15d9f834653d5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2230493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8816b62a7940807016b5c195d71a196ebed36dc22163e268bd84df3201545fa9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2243790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c626a3eeefdec8e5da79c65740d7671007f605a867e671fb73f54b53c7731c. 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/USANG2243794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1572bba1fc0220715b83b912ee2945144f779a9b776f86ad96fa5cd1a4f709d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USANG2243793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703aec0e0ce4bf5cadf6770e0f52ca67d2d247316d71b0dda8867e7915945e58. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USANG2243795.