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 0x350094ca87ef70979d72b4efe420bbff494c6ac72157eb611419242526c3b5f4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3ddeb36-ff92-44b9-b7bc-983d2d8cc723.json and https://artists.proofprofile.net/proofs/artist/e3ddeb36-ff92-44b9-b7bc-983d2d8cc723.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 0xc4539128a1e113686ee4ff75a3f69054eed4e454337a50ae97fc101bf0d36c57. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:23:53Z), 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/QZFYZ2062379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544e716ef539d043d1337b70e0a130e5a8672f8e3ef93be119185d70682d8df5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBKPL2156881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92e3e597f86ee02d22fb6f314b19e07ee058a36f9382dd5337ecb9f86944832. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH2326349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23c09f70e101f93dfbc598ffe700a63c0b032576a62741f090be2e0d7101f8e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ2373270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc045b63345977aff00ac052ca232a6b728cd877b48dbda9324a056fd6105d54e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USANG2422418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666c25b0c2146bd574495eaaacafddba2842323679c5d5f6c096e985356dc65. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:47:54Z), 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/USANG2454402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822203a9b2378381095fe0259797c9a6c93742fbeeb97a494e160d185aaa7f06. 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/QM6N22514854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975e7b16887152303cb13e6f88b7e7f325103a4a83265c8742b000860cf1ac14. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6N22514901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422919c458808c5f736d96266b1ebd7fa587422a413e0d61c238347c76d05556. 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/QMFME2555062.