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 0x90e092dc50a1e8c4ef3b39da2243491eb54c3c2fdb96b6d3cbf25c1952b9126e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bd6d17c-26bd-48d4-8224-f0b28b3b2cfb.json and https://artists.proofprofile.net/proofs/artist/5bd6d17c-26bd-48d4-8224-f0b28b3b2cfb.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 0xe902684cc664c28a6d10fbfadd65dfd5cb16515d527066e87ccc8703311dc689. 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/DGA0P2437118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b43311dab959efec2f94dc795158fa482baaa058a68cfa7a1d4a1522eef6ee1. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZZ782406766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148f6a067a115087454901a7fe46a9416e00321ba342d15102692b51921c2834. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DGA0Q2431847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa0063183fa9f7784d1e2bf4f7d0edb3b89ffdac0d7658388ecfabab53090f7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:11:45Z), 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/QZES92590137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1746ec2f2a455092dd49eed1f0e7b09f67256f425bfa692f1c5fa82148526b6. 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/QZES92590139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62fa9a0366544f547b86c9a2aeb63e8dceae7ac1bd4f957fe413084f40fa7b5. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/CA5KR2533143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedb82f4dc455730d06fba8855edcf78ea412a49c5e43f944d84e411e987b69b. 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/CA5KR2540891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24f3663dc59be8a11fea485ce93014b838c21a15452bd288ee4a11674d9b2ce. 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/GXBAV2100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2441aa4e50a3b571e49f1b2869ea553a20c8c1832c185370bf81c0f5508096. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:27Z), 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/GXBAV2175085.