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 0xf1d59a8ec0d7d961a1a5ba2a5c2f9fa676e1aa7d7dd9ddac44ff4af80ed10aa3. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2689344-df97-4d3b-9d4c-36454512d92f.json and https://artists.proofprofile.net/proofs/artist/d2689344-df97-4d3b-9d4c-36454512d92f.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 0x726ddf3b7d75d07d1442e6b54d543ff7f21c17b89b8d3df9f6987a7c6fbc39c9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:36:15Z), 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/USDY42497523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb0d0cf81a07653b117ed0b56a9692f2a49303af7eed26b09c4e2edada20c1a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM82428226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239c9927a6ec68765e2648dbac9df99119db3340208be059c1398e48b2e9166e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USCGH2560831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dbdd5fe4903db093f62a34fe37269b651e1215c19bb8589781b446bec8f5c8. 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/USDY42497521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ede9b0b67a7d1c5305cb1ab8aa059e3ed6247a4ea1420636a68c382c9142d9. 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/USDY42497522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726ddf3b7d75d07d1442e6b54d543ff7f21c17b89b8d3df9f6987a7c6fbc39c9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:21Z), 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/USDY42497523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49be6534dde9121106b535ec8745152c4cd0ae0f466e3e8c049fdee39874bcef. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USY242424885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8cde44322b460a3411f8415100c866325bd25bbce394e1d9ec8b2b98fc35bd. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:47:06Z), 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/USX9P2403858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb0d0cf81a07653b117ed0b56a9692f2a49303af7eed26b09c4e2edada20c1a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USHM82428226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606650f1aa357b45ef56a87063e14ab22dd915bf06182a18f0784d4abb47a7c0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:43:58Z), 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/USX9P2403859.