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 0x91bb2b19b622c35316657d57b1de378feba198331d749720fa49d522596c0a95. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa8b02e0-d19a-4344-88ca-034ab6646b47.json and https://artists.proofprofile.net/proofs/artist/fa8b02e0-d19a-4344-88ca-034ab6646b47.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 0x801f93861aa797825c45733b28593b10d4815fd504e503f97ecef4d427aa6b39. 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/USAT20703027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee5aeba8ec54b73233064d7caadec2023d30760c2d2fe27f276f17dd867d0a9. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USAT20703028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6015be9f88198f5a6222caafeb8050119b7ed284c2701fe745a087546772c974. 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/USAT20703029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4193ae9b868fca265c6a37e7d938844be1722c99ac66a7d9681d6d0ce529da93. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USAT20703030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc782f0b3e03368aeb0c5f54c8bf88f32e319eaeb82d9dc2c6d90cf3c9c10c018. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:24:25Z), 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/USAT20703033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e1676014e46aa8039110a8433d410de6fad9887a52e4f217fc02eb489850b0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:30:48Z), 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/USAT20703035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716a0c498abb30ea1fb16ae18363f0cde0deee1332ae1a382ece47c1ae4fe892. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBQZU1000016.