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 0x6831829c5694f229ff12ac81a97484193441d01760f173f4f7f16238d6bfd0c4. 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/79b914bc-b564-4763-842a-c200188ff2ce.json and https://artists.proofprofile.net/proofs/artist/79b914bc-b564-4763-842a-c200188ff2ce.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 0x53f246f270a6e0ba006f9570afc5bf30f69eb23f22910a3f0997d43eb92084e9. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZNWW2098372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde00ec3d1304c5bc3808e946ef43a96b0e623e534c7bb398b002748b03537632. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZNWW2098373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369112f2d6bb7c8ecf09c680d75240dd4a1beb018c7b09ec364d28a5c4f9c69e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:05:07Z), 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/QZRP52182137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359b8089a05e04593728898bbc96be5c75643215ab821636644988d8934bcf94. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP52182138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26660a39e104713567d821e8af0932ad545c5afb2f6c99bb1d13ae43d8efa1ea. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEZC62402593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c5be3feb0fae83b0ee43428439b3019e3b7c24cbeef2268d355bacb8057602. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEZC62402594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648a7e10977dfb4fc570d6345df0859d17d8dff8919f2e86df30276cadacf16a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:59:32Z), 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/DEZC62494187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3983395a861dbc13c9a4b232526448a1b78fde3b51d45f81f78dc7b17df7a78. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEZC62402596.