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 0x1800fea21cbde3a57bc654aa00f69150b50a98d751951326a9e6f3d5b2e4a411. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/748e91c9-17b2-4c6e-9505-56d8f34595aa.json and https://artists.proofprofile.net/proofs/artist/748e91c9-17b2-4c6e-9505-56d8f34595aa.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 0x9b93fccd4389b6c30ec14027ba53943f50943d654569d287778818f8be00a492. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEAX12004001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194c5a6dbb577a416e3ad3a9a4d2f9d11d9955c8b3f0c12f8c7597eb0b5eef82. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:51Z), 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/DEAX12004003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab3cf16bccc2159cbda4efe2286cf7375b954653b744fc9f60c4e4eb933aff0. 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/DEAX12004004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6334c5a242a55fb22db6d04bef4d106ecc8ea8df06c64a84d87994db09934f9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:25:50Z), 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/DEAX12004018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739ffc00789921a2cfe38e44228a107fdd40c427075f047d424f066b843989f3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEAX12004015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e67a00b6cbfbd093764597259996a90401e1ec7ea8e12cb3a705a8112a9b3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEAX12004016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386780651cfdacc64aa34c19cbcb51a4d16286c11cdc97a7e72751ef2550b858. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEAX12004017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a815166887a35cb064adf2824d1d62c75bcd674a53596e2e4384bd201b9a9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEAX12004014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1684744d9129760a7264538670c8fb30abf96d60191743aeb9202c3df79a86f9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:44Z), 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/DEYT72004017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a65c01c891c0d30875b5d943c8d808e1db9626e97d4b86b835357217ab1c24f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEYT72004019.