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 0xf40990f9cd49edeef0feb15411c08b9a2786b65990c2e9063a23b0b9ad743b99. 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/f3312aca-047e-413c-ae21-6ff77d708dc8.json and https://artists.proofprofile.net/proofs/artist/f3312aca-047e-413c-ae21-6ff77d708dc8.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 0xf7f15dd2e56858ff62ea3c70288b63169afdd036f062d14d7635fd3de0d94800. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4TX2413373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f7d3103a196acafa559c1b72d63d11c8d79d5f1f7d2c0c6e30518a0d23e4f6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DET752400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b1d807a9e3863e2a3a7f19f0be0a0ba4fc6eb71a5717b41899572b0faea7ce. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:41:51Z), 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/DET752400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612cac3e0ac0cb4af4dc5f6d978ca3a07a9abd57d4cc8a5c249bd596c211de2d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX452402213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34c8e6c2345849198d2944cd8e81cd5dab49ae8520898b0d2b4e06df9873259. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/ITBVO2401018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa684c9fb31b1212d25ff1dc5572e30e1d593ab8cda5308bd1ac3a9e828e1fbe4. 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/DET752500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9385cd117b1ac9ef5bdfa0d6a48d250db58279af8e7fa04fe368d85e9a4442ec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITBVO2401022.