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 0xd2b53c8591a6f23b1061348efa25019160df4daa37f60a7bdef2711157525d2f. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbfd3ed6-2a8f-473f-9282-ca873d54a106.json and https://artists.proofprofile.net/proofs/artist/bbfd3ed6-2a8f-473f-9282-ca873d54a106.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 0x5c2ab929c1066a30d3bf3daa71f597d1448f6539b0fa3dce048fabde27e6d3c6. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:37:36Z), 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/IL5842132419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88a756a7ff6bf8bffb64039fe3d7c0e4d4a5f2963b8265989f9f0b8564ca08d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/IL5842133457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034cb38e1dbd1f91b3f17884c4c554bf9b4c0e41c9e6caacd96f0baf2a70c3a1. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/IL5842235833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faf0267b4a89a200836a05bae41163d7706e21a486cea9a9634ac9b20e49390. 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/IL5842341946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4da6f99d6365e607f827f1c9d24112bf672b91860c9bff16238effc97917c50. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:24Z), 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/IL5842444250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10cd3736502f6044a15e94f794701ea170d8cf497d3a6c7257f6c27d850cc75. 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/IL5842445938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3612a74d09e45e5c9a11be58c4c7a4efdc4a9b18c59f1aad65c08ca830a629. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:03:55Z), 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/IL5842556332.