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 0x7074475264f2447e2f77f7187e1cdbf1494b0b6c72c1956be2f9a379ccb9eead. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af3a1620-b4d9-4a75-b9b5-9f7eb30fc938.json and https://artists.proofprofile.net/proofs/artist/af3a1620-b4d9-4a75-b9b5-9f7eb30fc938.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 0x35e3cb19d7b5cfbe7ef7e89f98308394bd4e8420324fe3da4d93181e7daea285. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZHNC2520538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42712425276df526eb5ee7d0f0ecd9ec09d238e6f38d0566b600aeb6e54ba298. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:05Z), 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/QZHNC2520539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e8faaa2ce376b00ba200cf11e4b8a21db4bafae9df2c5f1f72ca0ed5e77937. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZHNC2520540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc875c88c3cd44e1f2484ff3323b6d2cf3c8fa9fd6422b8beb1cdc281d5f731e8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHNC2520541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291efc8b74425e25f0e43b9898994d8ea83f773ff95dd1800e60bdbf4db6b506. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHNC2520542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2cb56c2b93517ec780b9d111a8d9e552d2fe87ba5abfba9918e5e0d252c9fb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:38:23Z), 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/QZHNC2520543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cce030ba1b09f6881c1c2372c21a3ba07d8bd08a9a2eaf969ada5b76fbcd493. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZHNC2520544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275a5166b81d97e7f52e38cd190dfb1acac304ef47bbbb98294c071513a47ff5. 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/QZHNC2520545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568d60b3ebf243b798294e7545dbadc3a649e9fc8d2d7212f649e7631dafc6c3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC2520547.