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 0x3367d0a650b3994e63b86e54048c43315ccd15f6180fbe600b40283b443da48e. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0f6443b-aff9-44ab-a9dc-794454082d8e.json and https://artists.proofprofile.net/proofs/artist/f0f6443b-aff9-44ab-a9dc-794454082d8e.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 0x7275d313265a7999b7f3200eae19446c71e724e0ba89f6861336d345f989ecb6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:10Z), 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/QZHN72599818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2001827bcebaf8e2e824070b544983ca49f2a9b2bbfc5d1532d61f608720f31d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN72599819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a31a414b7ec9c00ea7ad10df8b4c19c926e5d4fe90602b538af485aff45914e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN72599820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c9f17bbb65858d3f0f8f5995488f58ac9ee53e9b7a802e3b1d31e71e48953. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN72599821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf424bec3b0cbbd5865a9ba9f5ada9d204ee07a2c9db10a4dbfb12333de276f9a. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:27:48Z), 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/QZHN72599823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cf60c618480d979387b12ceb3c59e405a303cee0fd0b95cc4892dedc317eeb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:39:45Z), 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/QZHN72599824.