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 0xc3596b92d778a82b40958ad3deb50887ca2175a08d87a838ac0b3ff7d6a4af27. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73a02c48-7acb-491d-804a-fc63b6413ba7.json and https://artists.proofprofile.net/proofs/artist/73a02c48-7acb-491d-804a-fc63b6413ba7.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 0x76883a7f834ee2fe3fcd6713d49ae64d16436a861a0208abc7e3dee7f1aa2844. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:29:19Z), 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/JPJ591701606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed37cdb22feff9eff00ea376b95f92b542839e368cf2868b7ebda9d6a8b4d6b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPJ592001416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f9f43f854a7a09309623eb4dbc0a44c319342c21a180a70a722e802a9299c0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPG102201397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee421f66ab8e80ce50ba90f1f7435f7c36529bb0c362e104f929c57c025d2c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/JPG102100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aaabe125264d0e74d9caec91094d6e729cff455a710ad730bbe5916ff20311. 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/JPG102201398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72080583ac8c76c535d46fcaca05d7023cd36af59ed03ad118d99edb500b01b. 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/JPG102101419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9a940022d0bdc9f8857955368a7fa0cfc76c98644809fe4e06935f03fdf791. 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/JPG102402327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52437d9233c7bad5ff544155130e5d63af9618bdab7d7bc9864b6a7acc40ae6b. 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/JPG102500838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0780f4ea12f62be06508dca30114390147f9a2212273a014b9d242cf2f3dd17f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPG102500373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0755112a32b6d209b415206219a88ae9c17ef59fbb21760c4dbfb39f20b223. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:39Z), 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/JPG102500840.