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 0xc09e525c59fbcb04b08c0f438ab6c24e86da49986ffe96175d86973ea0fcc724. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be46f595-bd5b-4d78-8f3f-a870deaaeb5f.json and https://artists.proofprofile.net/proofs/artist/be46f595-bd5b-4d78-8f3f-a870deaaeb5f.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 0x131751a75affa36e83d583961891e0b1d2d13db403f071339bb5c5c6ffc43b19. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BEN581000461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee7a9a4dfa10796671be4f49f439f26c26c3fff484d8d1765098cb3a9f857b9. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/BEN581100375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d756b25b695d0170dd49886f28936525886a6aaf5e05c2db51511918b43f2cc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:16:19Z), 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/BEN581400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d85d5ca812f50417a9feb2cc0ff9c4e021c73d72e8a08fd41341fe71e09b63. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:13:45Z), 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/DEDH72300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131751a75affa36e83d583961891e0b1d2d13db403f071339bb5c5c6ffc43b19. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BEN581000461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84a53aa08115e5defa9052fab636a4439adc8f4ca3eab8c97020f11fede6f71. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BEN581800274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae97c8a319577cf284ec08927b08ea9e76bf9e6550956c4154c4881794f20203. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BEN581000233.