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 0x82a2ef3d5afe9ba4731f481cc44b149fadc485850061b1dc72a9b581f68617e4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5906ca04-a159-41f2-a292-d2058a8caeee.json and https://artists.proofprofile.net/proofs/artist/5906ca04-a159-41f2-a292-d2058a8caeee.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 0xecc84704f104dde10f92f67bd9bae541aa983d91e3a484e8ebe06135146ba20a. 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/QZFZ42388530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6dfdb9dad25399ed6c01c874132c2baaca171236e6fc0ebea4ec92ce210f5b. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZNWS2243486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d607274d7b53dfbcc0dee277a5facbeb268e00e66e6cc54430419b590fd37c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:24:53Z), 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/QZNWV2230999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5ea394b2e38f637a123e5560c17e4bef14ee02e66cc5ba80affa0a2024c255. 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/QZNWY2279640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a73daf9a9da481cc76a24ac0ec1a154e6ad78c99fcee67496e5257ab4c39b84. 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/QZFZ22349887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204b662abb5a1c1b6a0ef9ed0cd5d6dc24318a332095b6aef51aba5612935aad. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:35Z), 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/QZFZ72300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b60caacc4e4e33daed08a26dbc6bf8d921bc0491d7eb3316a36391ebc5fd72. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6L2322279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9ae51fa53691c3d9f0dc44f3605c83ad5df0e841c9f51514d6eb81777a5cbb. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZNWY2378500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e71c94a234ecfb6603ea7d2891e954f18fbe8c51e60b81f6f0bcc5e4d924d8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:22Z), 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/QZNWY2378501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08aefbe0e79cc4d5147da7240c2f717169208d8641ac0706ad859868bf6983c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB82327638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d58c4c8f5661f1d4908029e8ad3cbbeadc706420467ccb0411ee53baf1d43c8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB82327639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19b50e54a311aa469538bb2983801ffd5147916052b634354dbfec2b7b4ee6a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USDY42480444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19b50e54a311aa469538bb2983801ffd5147916052b634354dbfec2b7b4ee6a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USDY42480444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09c6c47fd5020511f5314814bcb1aae2ae9270e969fbfebb39bd299e8fe83f1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USY242464916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4579a05a177c5a464bc8668d205850426f43661493f1666de998fcbfc08e2e0d. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/USY242491322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cfda9dfff27701428c7c36022fad17014011a3e8aecff8f903b718e8b72b9a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USY242491323.