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 0xf020a6d8d923678c523917841653eadeab86584d0733092836ab37da30f95eb4. 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/1343ea5e-5141-4615-a6b7-0333d75974a2.json and https://artists.proofprofile.net/proofs/artist/1343ea5e-5141-4615-a6b7-0333d75974a2.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 0x6e7ef94c891d149ce0f1240dd2e1cbce4f64891a83db2480c85ef2de44114d57. 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/UKN6R2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589510fe1aa78bb7c4cc71c752538247dbcf0a95624669a3640b1504958785b7. 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/UKN6R2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca086eedba89541cfdcc87a9a101797896ac229b963e98f1d196e9870f5162e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKN6R2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62884b3607a324740504b242586b4072e6e3f4e9b03f049425ee1fd6806fa326. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKN6R2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc9e81fa52a442c920b3559b8c549d3a309740d1481e43e8fdfad909d68b2fa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKN6R2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e608477b05f7541969d54ce0c0d688c2629e5bdcc4a8337ecc136d5957ad23. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKN6R2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc9e81fa52a442c920b3559b8c549d3a309740d1481e43e8fdfad909d68b2fa. 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/UKN6R2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5540d760f2cc395bc26bb93db4a1dee74a8dc884d68eaf7671466f76ad02c81. 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/UKN6R2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e608477b05f7541969d54ce0c0d688c2629e5bdcc4a8337ecc136d5957ad23. 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/UKN6R2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd239d569015e779d323d6d15a0d298bb0e6ec247c1b3b5cf4b9145d13185637f. 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/UKN6R2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e08d3c17449618932ba695c6b762da50e6e69cb99106603c5b761d39378b18b. 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/UKN6R2000038.