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 0x0008232b47f55962ccb5e3d0a6ad979cd1165019c7a5fd8a232578ff2e3d36a0. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9e0bbbc-8731-48fa-95db-139a5e92ce55.json and https://artists.proofprofile.net/proofs/artist/f9e0bbbc-8731-48fa-95db-139a5e92ce55.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 0x3219e3e346e4125bf8247d0f4aaacf7d5cfe8b64ff5e86d97cb53365ff28314c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/AUPL20900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35a1672b87cdde17d5f0699659bef04c2ce15bc81b465c3763b2f1af2614c84. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:08:56Z), 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/AUPL20900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0300b5993e75eac9bed85429c74e6083f10082e03f666c7f52522e98cca711. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:24:20Z), 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/AUPL20900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f23e179fcd6097529e60c4e15f67632df358f3b56b03114e3bd5f5748e7e6c2. 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/AUPL20900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f4185a5095db1a5566b7a38b7dfdf3adc218ff2a8174baec338cf895fe7451. 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/AUPL20900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceeb329a7ca0987a7cffabff6af78e944e9093b31d35cd3b26468d109cb0606. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/AUPL20900007.