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 0x381d8350d5be55e93adbeadf57b6a6c0591c87cdd126d94132e40ff91004e76d. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b8d83cd-d57a-4148-8da8-e6b0e1d1c891.json and https://artists.proofprofile.net/proofs/artist/6b8d83cd-d57a-4148-8da8-e6b0e1d1c891.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 0x445b60a43a7e6a004e28542e627ef61f61a39ff8d68f557b6accdae36693e184. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLC591600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf712dd080008ae7315e268470f6cc043361e3eaa0d5b1855df808167bc8a8f67. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/PLC591600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7417451e944405515597de27a344851a4a6444b9692c4fc44701f172db4e1f4c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLC591600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81700f8fe637e619921dc5c62baa5c1f582395aa3cf3a55593d3c00d71cb7a12. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLC591600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161d50c67eb69f7e78950ce17687381f597a743551cd2c76242b4a58189cd147. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLC591600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec14be62ba5db5c39799650889b29c1d7cc59ab43649b529690ea3e31e0e83f9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC591600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7b18dd4e54eb947c949e1e96766f030049853b8a981e951a72bb6745d7eb7b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLC591600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faf72720c039230ea47dda8089c5ed72f5873cca875796de61271fce32f34fe. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLC591600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4977be37d0b49972b20c0c32884cfbcb87a70e9cbed09778defe33dc3ac338. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC591600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f103251e531cb16c62c0b6463869d713d69710ca3da6f01cfd98a404c350ca. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLC591600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47f30d4f6c33ffe7b139ac488606de7577c3c11d3999f92867c123e790ee624. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLC591600111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9909d45aa1eac560f3ff51a09f5ab8d4cc57e39bd12bf7a0c35ba140367321eb. 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/PL15B1910002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83c1b32e5172c793cbd5bfaef68e1da7b15f966ac6c45f664597c4466310650. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PL15B1910005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd347951ff941bb1dad89a5a49ca5a91cbb9f1357d62c7764ec2db2534810c4e5. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:39Z), 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/PL15B1910001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796ecb42ca3f84531bbeb4589384ed5ac3149c4bd95d88ecb56b8cd53f771781. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PL15B2100011.