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 0x8b481ce11336fdcad270f5ee65a2f805ea614e8ee7c4f55c2f3c8eadfe36ace0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dadc1173-7483-4775-a159-ee44e6044ab9.json and https://artists.proofprofile.net/proofs/artist/dadc1173-7483-4775-a159-ee44e6044ab9.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 0xc6711ec329f393b608a735982d0a8963af00e5ab0306d8fd18828528c5fc4edf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GRPA12200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2bb57935d14c10758792489f7fd9afaba80103152205dac46c66fc22ddc3cd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GRPA12200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cf589b55050330a2853edb868fbf882eb7684eea84b2c7cec42a19ce64ea0b. 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/GRPA12200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb18ef4db5f509126461128d2b548449f47e4b1268ff4a73407c737fdeffeb34. 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/GRPA12200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722102d6569d968cc842a2c64d27709457c55a480c91755a24c458e4acfa67ca. 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/GRPA12200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379371411f03020fab1f938f869a872f1f9db0f15a9d4bf74b9cb9c8245c42e3. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:01:48Z), 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/GRPA12200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036c80e61e4887a793a0fc06be27c46671a7a5645dc37d4a18159e3944753f77. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:14:14Z), 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/GRPA12200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73875ea3ffd9eb1c982900d7a9cf3b246bd449382ad7ac09805e4cef7873fd15. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GRPA12200151.