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 0xf3c9998b29e06c00af63a4e76750eace77195d243931b09bd682ed05d7458500. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3878f473-ce8b-4a0a-ac71-406e45a94943.json and https://artists.proofprofile.net/proofs/artist/3878f473-ce8b-4a0a-ac71-406e45a94943.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 0x89fd9187602a566ac131327bd47847010db104b7bc4738d5cc212ce34b714818. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJX2559438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159caf8daeebaa9c4fa8e51de2835f7a9c590757edd3a5b77193d2883e3e6a33. 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/QZNJX2559446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3906b37f87847c73f304f8be009490eda0c49c50e23512e770270ad04c546ee. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJX2559443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa769ebdad60434f50ad2b6cf8d6ceb6947e371f4ef7d08ec14133bec4674d453. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNJX2559442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48c92e7dc32c071cde4b15763552fc32aa49a5cfb8e4ce17e51b8f1fd4c7526. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJX2559439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3906b37f87847c73f304f8be009490eda0c49c50e23512e770270ad04c546ee. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:08:28Z), 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/QZNJX2559443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdede2deae42880965fe3cbc28d7890d8b47dcd306bca1405b1ed2e4e8db78e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJX2559441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48c92e7dc32c071cde4b15763552fc32aa49a5cfb8e4ce17e51b8f1fd4c7526. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJX2559439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159caf8daeebaa9c4fa8e51de2835f7a9c590757edd3a5b77193d2883e3e6a33. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJX2559446.