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 0xf8d7217001176e0b40c76eb9e4f4b45fbd08dd11b4642e6d2e2d6e8057ec346c. 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/ba367200-08e7-4faa-a69b-01ac2d865ed4.json and https://artists.proofprofile.net/proofs/artist/ba367200-08e7-4faa-a69b-01ac2d865ed4.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 0xc738f5b3de97681c569e82106f290a9f3247600d1d742c85e6eb0a5e686191d2. 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/FRD6L1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628523b9b6e37ff0fc84a0159837c4edfd30021604fc973b39e68ab1bf086abb. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/FRD6L1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341c8b0024cab7c9aff4e9d3002973ea3588cc7e6dfa215dd687fcf983b82753. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRD6L1900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ec16ce8b438dc67d4e817a99f639f7f4cafd862b7a036a5797a9286a289a43. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRPZ92214370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46656097c2593f1e255b9c174123adeb080936bf3f752a230c5a1cc0a23587f0. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/FRPZ92214390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf86666e76a1d69aebf4a6af6dde17f2f2e86b69cdfa9c1077c203c52d95a177. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRPZ92214410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9db3020cd61744f42a5e6dbd4d9194ddc983721528940eba69fce878b838cc4. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:01:21Z), 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/FRPZ92214440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54acbdee85b98096c43378b6e57bb7410346d913e1585eb91bdd805c0da4a5e5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:19Z), 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/FRPZ92214470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e35e8a074d0c4ee378f49a4c0863fe9ed8e00b6ca627472fefccde48520ad5. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:48Z), 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/FRX202584559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae34fa921fb4dd6f2e42983d3c58ac699bce36bfe25adb48596a95d996d49bf9. 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/FRX202584564.