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 0x4453768cb761b712f9774eb4178fb2f9da509f113a8eb8493e91bd1746aec7ba. 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/d7e3a3b5-2838-4c48-a2c7-b90595b0d615.json and https://artists.proofprofile.net/proofs/artist/d7e3a3b5-2838-4c48-a2c7-b90595b0d615.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 0xa1778c65b3289fe2e1bb5fb64b955a647b1e71dec2d12343d8d5fff7b25ddcb5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPK1902935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cbeca7eeb4c2c7c8ddd8ab5b35b02b69f525421321163d06a5c974dc344891. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPK2047044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c85d98de5f6cdcfe047cea3bd3fbe7d67f96849d72be2a8adabb96b555d06b8. 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/TCJPK2047048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6340758a75cddb540b8b13b372573c71f2b3c409d0b260875e1b87d050dba0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPK2071436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b2889b23a307e7c52ef7a2a259e91489d590d07fffab25d5c3dee1005c40f0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:00:49Z), 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/TCJPK2071442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f9ac4486d74c33e1ffe6060a905a64bb46923b30aacd94daa92b744d6d9e24. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:23:56Z), 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/TCJPK2077413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137e7d3cdc171eae6fc0d0db925ecf3e9b352cfd28cee8c06cb810e5abff0544. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCJPM2042637.