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 0xd2873e0e5addbd5f3a3227559f0b82a449a7477922b0854f42d2f929b2480501. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1408bfc2-c39d-46d4-ab9f-48dfddaec2ad.json and https://artists.proofprofile.net/proofs/artist/1408bfc2-c39d-46d4-ab9f-48dfddaec2ad.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 0x0b8f93d961493d1e2bf3a9bd19af2be789c642fb241e9a7218ee71af7f4f2c76. 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/USHM90553763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87b8a2c2fb9a8029a4116bbb7480d24aeeda9603233cda702d0af918c312fab. 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/USHM90553766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6459e40c03affe07cb5f0888284ea95832ea0ac1364802a41288871a908122ac. 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/USHM90553767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6712cf77d404ee2ee94a0cdbb89487323b97c430c1f8f111def00c731a7105d1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USHM90553768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb1b7e0b9d0fbe43b40ad6b96a7992f699cd759a9dd60c62e1e407596f0b444. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:52:49Z), 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/USHM90553771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7217133403515a5cb8f2f69850a94a290cfacfe8834c90bfb54661d969c0f821. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USHM20609638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1232040e9a63b52d549090e68eef8221576a1b75e2f880682284175499460fcd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:01:43Z), 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/USHM20609639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491c6d0a598955df14d92cb21073bd98a021f266ee6e0a4991a40b38fad8368a. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USHM20609640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649d9057a06c240cab7b0619d308fc1b8b5a63cc2fc408c0eb34d05890a4895b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USCGJ2013694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b08e978b941361fdb45c437cb4007570b296db87333b29e2ea0c8f91624147. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ2013695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105cea8c93d0ae5ae78d20d82676046bff42a7c2c3a723188702484659070824. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM22150772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350e6380fb5896bbc567f2e37c55db2f654baedc96e95cff0f9e320fdea51507. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:39Z), 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/USL4R2160155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f03d3ba960286ed6f53f21110ba940754bee23fc9c8d6199ac6770906e717d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:05:52Z), 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/USCGH2227468.