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 0x8a75c24878b1c0c84c7b1f2a70e18876c62f0ca3bc1b80d7023d6f398cca4bea. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58d84649-0fc6-4583-9775-27dfd02a14bc.json and https://artists.proofprofile.net/proofs/artist/58d84649-0fc6-4583-9775-27dfd02a14bc.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 0x6a5ae8bc32977ee46a3c13123e5f86fa8464745d0cd90a8718d67b78302fa64b. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:30:20Z), 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/QZNWR2025956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8a3b3314835b56c19c7a93d3646d49627ff7e01f06f7b1d6ca2d0cda3e29cc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:26:35Z), 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/QZNWR2066719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c72c588fd31cfb52f7d8d392453c0090ad24e9414bbda31d3978484d8887736. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:38:55Z), 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/QZNWS2097617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5aeafc408b73746f87a21aa0d3d652552f838bc59d8952ce85f422f3c74c71. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWZ2027603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef39d34bb805bd585622aa0d75341a978a49d2c5cdc2b99d552ed19c325990. 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/QZFYY2109330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4919c28f7fdca54c90f1513b6db20d5c33856baf7134184e41274498ecb3a23. 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/QZHN42130846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1a653bc583727de5e6f3a7115bc91f8126b860673331fe8bc3ed837931e0c7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNC2122472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3486630779f09842e100c7723ab1a3781a716f6093b32b7d33f6d0e0c5a6d663. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6P2142492.