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 0xd2ca7a7d7fc5e27c8a9ddc7147a59b682a530d5f1c7e99e4c6699999db339d57. 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/b1414dec-aa46-4511-a776-a2c056b8c847.json and https://artists.proofprofile.net/proofs/artist/b1414dec-aa46-4511-a776-a2c056b8c847.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 0xa10b6c58fd0faa589ebd0664d36d9b10bd5cf6a8584b73924617169a0d7fe9f0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:40:25Z), 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/QZHNB2082890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd777656bd2b553dda054390797ad0e6839dbf4ecb0ee9b5df4ab51cc4a4d4960. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:20:59Z), 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/QM3DF2195041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a064df0262eefece559ba0f7626214e482b30b86a810c7b31a9d39eaab2ae93. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:19:16Z), 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/US3DF2244681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe742b3ac7bb574e4dfee51384be897e2a955d7722500288819dbc4e4d93ce9. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/CA5KR2453933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c16df1486cef14f784a739c7248e8450ed5a9b743f0ce01de7441dba3a2e399. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/CA5KR2477672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6358fb25206cc7d46bded7a4af656d38d9e9b4a23a6c5fb5c4f864dfe72cd72. 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/CA5KR2477677.