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 0x95d90a2d8ff0cb4ddd50bf1ac8340d1efede590cebf87cdcc416011952bffd66. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bda472cb-ecbb-4956-baa0-9642a9f3c3a6.json and https://artists.proofprofile.net/proofs/artist/bda472cb-ecbb-4956-baa0-9642a9f3c3a6.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 0xd821688df3e2c3987dde860b94ae9de6e2a4511562e2989f868ee2aaba468dc1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:10:36Z), 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/CH7812075250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820b9d490b737e566d81b65876df7d53e4b09701e45fbde6e82eb5b5e2940a1e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CH7812103289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273416dfdffdb237de2fcabce375590c51ee1e6ea4437696417b11394145785f. 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/DEE862301949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e6a21c3df680eb29ed37fb849a3ea2f475ad8e7f55650ad79d94521d0cfbb8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:43:58Z), 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/DEE862400368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87389a79b9308e3396eb4b2a3542658fc46de24dd2976eb3bb7f7b7740f89764. 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/DEE862400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09ee125cc8f67ca8d8706c3320c6097366a4f6715466de297487c4b37aab526. 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/DEE862400922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5efd773be559753eaa6813118904cbd35bc4a67c751e671fd2719b61160180. 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/DEE862501471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc2daaa2630446b73b90f60f07077773871d93be0db3fad44fc1630017eca4c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEE862401903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9100f4af3c2ecc3cd1c9b2cfb3b4f2ee3f08d40b24f1d9bed80aa5c63c0ec69f. 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/DEE862500621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49f25ae10bc315663d4be70cf67c1070ec3627639b95e1ae333fe54b6d21d40. 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/DEE862501179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa20fddcf68f140e7c82688c048995c541b85288d342bc29c0eeeea459f64b8. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DEE862402239.