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 0x39190fcfecdf8b3fbe0728c98e308adbc251290ef2969243266c9c1786a19f39. 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/5cb685f9-a5ea-45d0-bafd-11d9c33be678.json and https://artists.proofprofile.net/proofs/artist/5cb685f9-a5ea-45d0-bafd-11d9c33be678.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 0xef03fc0acfe19c109e07722d11d18dec4dc5af06de3fbc2477f788be6cd11b77. 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/QMFME1448032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4afa6d6764558a80f19b2b738569303d7ea0b1087d1db0c2d37001768b33ff3. 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/QMFME1448033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5a5f22f005580345830ae8afc2029417b32a16c118eded67b58d49010cf3fa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMFME1448035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f99213ce1652c72b295a62876bb78d027638d46534eca63d8a4a3fa7e95c28. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QMFME1448036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf114e384ed6f0fd65bbb43a5d9f1f4e3875a0a58622917710ca3115a899c72c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:35Z), 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/US3X51636501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ad4e92597511444a719bf87ce651b7fbfba815226f71eb9e1c8056db7e242. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US3X51636508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18f5cb3d18d93abab6b6f87a4b032dc776f2621dcef6a2fdadd7b58e6965223. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DESG40800125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b647101309ff5ff694f87fccad13f143f0ddd89b817068618d86b274043837. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/DESG40800126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ccdd072325b1508afe6be116ed757a0bc76da1b805fa3eb63e9808a0a5079. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM4TX1905786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386bca18faf9dfc8a0d3901f4daf5249953b6694515bb79c985e61cfdd55f5a3. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QM4TX1905789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894542190ddf1481e8fbda417547fde072b24f1b9b0de1d91dc3f4696f7df013. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TX1905790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e413f75ad9c38f77294e35aec6361218190b55881f03192423138bfd3340ea3. 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/QM4TW2188433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c766d946c687d4841d3acb5a8c1490063211acb82e00a537ce38094da2ac7b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:35:24Z), 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/QM4TW2188434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff172358244af4e57c341d02b5347a352ce5de65556b8be37fd8ed15bbe8b51. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM4TW2188435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e740ce595a9357bed792c4d4a4fad5e894539f8e1458c584b98c2477b82207. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:02Z), 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/QM4TW2188436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b06ebea37826f3713b9d4f788dc0132d9d16c4ad47885794e7a91679977dbd. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:50:53Z), 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/QM4TW2188437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeae3005a8c56219d42034b73edb14eca70afa272aa942034fb8a57e8b6823d8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM4TW2188442.