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 0xc1998321e8c6937210de8b0768960439842a798206605e0bde3ba09586ff835c. 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/ddeafd08-2948-4fc9-813d-0d044920ea0a.json and https://artists.proofprofile.net/proofs/artist/ddeafd08-2948-4fc9-813d-0d044920ea0a.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 0xcd70a8488a555cf71952095604f830d1f9f60e910986c2e83af69404041f8dff. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/FRU011900246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff68633d9e1f2b5467bb816cb4a56bb8606a96fb37614e16ffa793e23c77efee. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:58:42Z), 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/FRU011800224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d4ccb87938681898eddbf88c80992beeb2e78e78e932a3b337b470bdb23ed4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:48:52Z), 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/FRU011800227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e6a2e3f3ac57d7527d7785ae58e14a41855f5a0528ca357fe8e81dc8bff40e. 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/FRU012300354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c20939e2e11952edb177398bf565e274bd67c585b162bc784ffad9d5862c12. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FRU012400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c99bfa8649d4bbbbe5435c351824bc190adb0c16a6e018832dbb3c1be4c61e7. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:33:36Z), 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/FRU012400417.