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 0xc158a8f4266e4abfd900a4ae0c1f202f54aa77dd1960cc47246e81568028dfeb. 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/ddd5f817-5ce8-40ee-8e74-c58dddfed701.json and https://artists.proofprofile.net/proofs/artist/ddd5f817-5ce8-40ee-8e74-c58dddfed701.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 0xa32b0f2a7f3f7a1f4b3d2b507afc0f0888d05a0e34fb16788f1f6ef4fb85dff2. 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/BGA472513730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e8d7ddfe39b95f047cb64eec4622dacaa6d2c9154d6f75de10d638732f95a9. 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/BGA472513731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966323d3f43a2191d5a59d036d3db5f4f644750332e6962d4fa5b334fc53da65. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:27Z), 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/QZTAU2552292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5046872d2d52a5855bbfa2c7ae747c4dcb4cb7e61543dd2850090f699a4b7e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BGA472523872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5283891ac2042cc3da002ef2966d533febcd241f48ea0f395bd2485e660a7a67. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:40Z), 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/BGA472524383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389d01886cd29792b519a4956c20c7319d708186dfff12758a00aec5c5ef7c33. 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/BGA472524388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eb3bbb3eca9ee0d902e7e927867d20229f054c46f6533648e21820bde8f5bd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BGA472524384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6779689325aa227d2d1a91577fa3a64d192c04a341b8ff8a7a68ed9d7eed2fef. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:08:45Z), 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/BGA472524391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3981fc2f463f491819fcfffd435c03fc5805cb89e919706b93d7c506a66695cc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITJ871601003.