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 0x4f808492ac376751056b8ebb35d0e3be7b833132bb09872b4e73f2c1ebb3d5c5. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2e94c03-4ed0-4943-883d-47849b441152.json and https://artists.proofprofile.net/proofs/artist/e2e94c03-4ed0-4943-883d-47849b441152.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 0x670574036cd3a7342f5266c85b15ea5d9426cceb5c0d0181d0960fb2fde3ee50. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:23:49Z), 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/QT5M42531880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3805b77241006cda2d6999b7a4d303ce10ddd921bfd044e0ac7875ebb85e9fb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:17:57Z), 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/QT5M42551982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74f5192e201fa9849b43fcecf576ba6bd65523458f312a91316a373a3311b3b. 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/QT5M42517623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5ff2cccc54cf360590bbb289ac0fdf35b779f6e9d6ec906f530c935b6e16a4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT5M42550122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa88942f33363939b430873119dc989c6e269738c9398ccb2ea4f14baf5dbfa. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:32:09Z), 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/QT5M42539315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc1b7291340034abf9d228b58f2ec000d275afaa4fed8d8b02789c62d434554. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QT5M42509798.