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 0x3394b932cdb9d143e5097e2167e383787d7b5de796e9b7f47c000c48de2ad50c. 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/501b51f6-0231-4933-9539-fc6135ca329a.json and https://artists.proofprofile.net/proofs/artist/501b51f6-0231-4933-9539-fc6135ca329a.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 0x84596636f2080eae5a35921a0efbe97331f18211f608e007a52fd1985e1178c2. 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/QZFZ41963604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee98f695908297f0b1db4c61b662f8d1410565106d48e099d267cf9c25d7855b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DES372100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa2bfbaa1efac296a2d7e04ca1383036a91f8fcee4cd9ac75093e93c789cb6c. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/DES372100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fc0a675750fa662c98bfd08489b0f226731e04430b28c611e2a32af93d5c02. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/QZDA72135495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215de155527fda797aceebf8f6a6f35ab74c3ab41e9251d14dcf84c0ac016a72. 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/DES372100607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2ee308f4d5729769920f630d4c79b238a97219928358b844595c27e70e59e5. 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/DES372100608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af467ee6fe644dba5b40446662dd657354b93ce18851b670fb2742b264b85a9. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/DES372100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a9fc400d6273362653e3e056a31039d358fcdc916582c3e933e9443e8884d7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DES372100611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ce89e927e80115494e2f04ef4a96e9313aad0e916f757724747aa3bb7f54e3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DES372100612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe156085b0d5b826413b134600c8cc3273f364d301f0e6de48d2373a1eacbaaa6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:25Z), 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/QZWFH2417389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c21fba10e226c8916214fb4cf10958912584b6f7c38737e8fcb543c41dc49dd. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZWFW2406295.