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 0x30f6e0e4ec92e4e53eb17ad8d998abfad3467d189c8636689a5352c064fbaf11. 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/8f720fa8-2442-465b-beb0-6e2f3d6e3828.json and https://artists.proofprofile.net/proofs/artist/8f720fa8-2442-465b-beb0-6e2f3d6e3828.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 0xc4b8d87cda2c5adf26e266a547ac4133ff54902bb406114f4aaaa15c12f09b01. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB82363641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be06a9d5fda98dd699b61a88c9fa884dd6de7678806663c22ba410e3d408768. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB82363648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e903b0fdbf24f27bf8dc12449b05d4df5c1cb615822b41658e5f0a5a0a22e59. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:07Z), 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/QZTB82363649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d66dd84bf565f9e37070989b2c9a7abe83794ceee9a9ef30a0ff80c30e92a7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:19Z), 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/QZTB82363650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dda57cda8c1b82cea985c5154d6c4904c6eb2f69e3b7d7d0ee3f4acca714edb. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTB82381749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c496358e35470621fd86edfbd127faca5a9f43dbb735d4215cb18935bc4c08. 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/QZTB82363643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380b179d7a3eead716953dbf7be96ba299fc3598436f0ff078ea218eb83ee9b5. 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/QZTB82363626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e73f8721a922713abeeb43acd33a7304ca74225280b24a0c6853b4e28865ed. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB92494024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271dd53cb604f6e339794d02ac7afc738b516061ffe2f2f0a1e04308b7fe7ba5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFK2488352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cc6545ecb0f559da45245ea339bf05816bade165fa20631351e8bc0db1c124. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:17Z), 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/QZZ772424738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c54dd806e751854f0983f510099fef81c059014edea9c4026d4816da0017e8. 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/QZHN92537756.