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 0x4a43b0ed99fb19882a4890c2e184062adcb851c234ba53a64d5f4f52600513c0. 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/f0832e0f-c11a-4449-8d5d-b71c77ff5056.json and https://artists.proofprofile.net/proofs/artist/f0832e0f-c11a-4449-8d5d-b71c77ff5056.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 0xa6a95d70a9ad9e49bea5c35fe70fffce01695c515e573136c2fbf2c79bf02155. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:40:53Z), 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/VNA0F2128241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90a0018f453e3f06be1fc9c0d654f81dcd5f82966b99bf9150801f37ba2ae93. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/VNA0F2128243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06171843c7338259c3f50613c520c856a9f3d9d6a1010f30e211d98af799855a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/VNA0F2128245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b55ea38f434bfba59bfc6686af1fca1d1f1646617e703a2c5671bdab72f157b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/VNA0F2128252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eb6e75f044c962fcff4365ef337d755d18ede29b5f0fe7e4405e1255d30fe4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/VNA0F2306683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bd84b8e35cd32da667692abc6a2f8a7edbe753690f666ce91fc64449fa8729. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/VNA0F2306684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e71cac3a01c8b67140c49fafc4824217aa59a1044bbe2a2e3b30709fd85bc7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/VNA0F2306685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237f3bc18ffe57bb678591590bafc08fc10befaf562f638157ec26e8d1986da4. 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/VNA0F2306686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13735032d6d4f3da19f0f7137d0029096568ade09901e492f0e91cebae013e7. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/VNA0F2306687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134f1c8bcb97c196b9b2892e5937ede9d52deaf555f4a6fe9f5bee3507224a44. 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/VNA0F2317588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42d468fa97403a664b4d8c2d04b30fecc3a46ce2c42a9cd0f1630e0adcf3d0f. 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/VNA0F2317589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a17c04695437aa44347eb7571c069491644e916d160f7e9a10069bcd1b8a7. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/VNA0F2317591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bafa1067ef8f79ae0c9812b994f279ae8fd858b4fddc284f49b263f2effea9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/VNA0F2317592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf467b9419e2171e9d9cb38f2673c409806707b8b332977b8afbe5df48de033cf. 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/VNA0F2317595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55513e0b82c1db55e54aa61531db36c0f24ec308e441a41a343feec367d75c8d. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/VNA0F2317596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c050389b74dd12a27dcab715f40e3a74de10e1cd2d59bd7a2f7d9249dec87. 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/VNA0F2327198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f467ebe77823c49283a8187173ea429a1aa5af696630efde6592be57fdd57b1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:42:09Z), 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/VNA0F2504920.