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 0x006337ca6b7d2b6ef391aecab8bc533e5a6beb0e66b7c369cdd865f36188e65b. 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/c0d33b52-e5a1-4252-9aa1-d86ee1513db3.json and https://artists.proofprofile.net/proofs/artist/c0d33b52-e5a1-4252-9aa1-d86ee1513db3.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 0x35848c1b58d84194cf7d30c4bf23a9ef074c72766db2b171844dc0db9b0491f2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:56Z), 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/JPY252100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f516e446ae92d11bd6eb6740e41b0f27a723c1e5732030fdb96878c7a2c496. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPY252300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60439077523b5b9d2cd26b04acae83f1679cd189205a45e997121e22662448c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:56:30Z), 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/JPY252300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65267042c74035c046f073c8ea916b1f3a92e630c73e738d8cfc344b34d99138. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPY252300189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7751549ddd002b62960efde1a8b82192451ee303d6a174b01f9f72a6c9f2b9. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPY252300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8cf9a99a87dc09cf5ebb44ab9b807c246fb982a83b13b09680266a25cea725. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPY252300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48235ee6ce60723f378d734d81f6ce1fc34df0e851da57ba67fa1a56bd44bfdd. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/JPY252300192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f516e446ae92d11bd6eb6740e41b0f27a723c1e5732030fdb96878c7a2c496. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/JPY252300183.