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 0x92070d8e7a02cfa8c76b8fe11156d0649a58dc59b4ffa3a9d7d5881024d65ced. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8caba6ff-d6e5-489a-8069-2326b3603108.json and https://artists.proofprofile.net/proofs/artist/8caba6ff-d6e5-489a-8069-2326b3603108.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 0xdcfe030504ffb9a4d1132af8b03871609cbf70e5579d8860dbe148919c013caf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6DC1573998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14d93635dcd122d39962c1240efb2ed4aab3aa831c0a1002bd30f94a5cab48b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QM6DC1573999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc5eadb0b8818d45b9367bce5cc5775745e6c39240347a1891c53670b2b4d7a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:03:53Z), 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/QM6DC1574000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442129f8fe520ef6a1cd4cfd35b76b1ea9f149cd51586ebc0110b97e53ad5b80. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6DC1574001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f389e060d86ee3cfc4acc2bbae39bf143f0a15a404999b2ae98c459459178dd. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM6DC1574002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a04891f9f8e3157f1a03c0a1b442f204535f299bcfab47ae93ba1641c3acbd2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6DC1574003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393fde99effe646bddf1676bf8ec7da55e0e3eaf8aed61936374e972ddf163e8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM6DC1574006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abb11740c09fb89a0e8047c82075b50e680cd1ea978cf5bf617e7ac3381204c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6DC1574007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d72a067212fa3e5d33e93352e828e95d7191fdbbdc7816414e768c3950bf5b2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6DC1574011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe030504ffb9a4d1132af8b03871609cbf70e5579d8860dbe148919c013caf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6DC1573998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14d93635dcd122d39962c1240efb2ed4aab3aa831c0a1002bd30f94a5cab48b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:32:03Z), 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/QM6DC1573999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc5eadb0b8818d45b9367bce5cc5775745e6c39240347a1891c53670b2b4d7a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:23:56Z), 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/QM6DC1574000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442129f8fe520ef6a1cd4cfd35b76b1ea9f149cd51586ebc0110b97e53ad5b80. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:57:35Z), 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/QM6DC1574001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a04891f9f8e3157f1a03c0a1b442f204535f299bcfab47ae93ba1641c3acbd2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QM6DC1574003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abb11740c09fb89a0e8047c82075b50e680cd1ea978cf5bf617e7ac3381204c. 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/QM6DC1574007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d72a067212fa3e5d33e93352e828e95d7191fdbbdc7816414e768c3950bf5b2. 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/QM6DC1574011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de23e30e8c53b22dc6596c48a0a75bed3de7a4a980addaf194ea85271220d57. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:45:28Z), 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/MXG702200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316925978e363febcab0c031dcb35df9461a5f728aacae3afffd51e3cc595748. 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/MXG702200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de23e30e8c53b22dc6596c48a0a75bed3de7a4a980addaf194ea85271220d57. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:26Z), 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/MXG702200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316925978e363febcab0c031dcb35df9461a5f728aacae3afffd51e3cc595748. 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/MXG702200286.