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 0x19f4ff30e8a1b7fb0d6e3048c24ce3fa26ca5940e68065ca21d2e02f135addc9. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8a6ce70-f2be-4f8d-b496-5061338d8270.json and https://artists.proofprofile.net/proofs/artist/c8a6ce70-f2be-4f8d-b496-5061338d8270.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 0xfd9b0d5b003b5522929033edc0819efcff9ac35486f2ae2251caab49c6501473. 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/GBKYE1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0e1b49e46cc82cb55666c0e1e3567e03c3d50a5b2e528564c5f74a6667fa4e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKYE1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fe2863897456929ae0b36279d2006deda53200f776dd47cbaa84b102d13952. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKYE1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91ed92b9389c3fb3faa80619750d1c9a205a6cd0b7979f4528cc89baf1d6a22. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKYE1200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13bf2b288496127089de560b7f451b195e683f70e5255a67b2e7e779e019965. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKYE1200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc594e152ba0a96a595a1956107b1fe8edf88db3bd6a3ad4035d03155ce6890. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBKYE1200005.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cb8d80c71caf3be8bb19c7e109edd3d00c8063b00e4ec5cd434216534f255d. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBKYE1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179453c7d2e902acaacfd23c4746d610940a3c93c9ad10cd1c487c6e64d981a1. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBKYE1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8d9c85a5de669639905557fa2f993459dbabafaaa5923bbd409d73a19f3b6e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBKYE1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e74d7503f7753c48bd107d08f8dfcdf0b683ee6d75a4029aedf51329b0c077. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBKYE1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8ba7775c6193e9da0fe646d47d8e89fc63f11a66e2908bc9027a73a8728cb8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBKYE1200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef2f801c82d5e32d3073c2b74d99e90db303f19ba378f432ea8b64d4055f612. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBKYE1200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9693bcb1daeb4bf3784551368817a3ec052107fd21c8b458671977c19538f0fe. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBKYE1200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc8b7def0241ec69ffc03e5c29784d8452d2ab33d61dd87e91cecdc47b718e9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRGPA1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639602be7933eafa04225f33e2489dcd14b33daa0717609266922dc17aa88982. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRGPA1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf83d63a7a61ac477fb8288426273ab72c7d7bb6f5513ed0b8a026a85add155a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKYE1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95be379d32b8662bd9b6b26a9efcb38d4d8f993d90872c3c136c8901256052a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKYE1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456b7ef70c517cb9d5228069d731a072a3a593c74cbd6ef1cd7253681ed96638. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:24:10Z), 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/GBKYE1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a7741e0c76145c1250a2e3124512b04489716024cec6c0828b3e7298d7b9e5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKYE1300011.