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 0x8dbc492c87f893a3a4449ccee64df3a51084d4485f6b33376e0616a829372baa. 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/485e151c-9806-4519-86f5-e69f67512631.json and https://artists.proofprofile.net/proofs/artist/485e151c-9806-4519-86f5-e69f67512631.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 0x3a9e41ae9250c9caeaccf25dd33592835bf701774bbfabd3f723ccc95a0f0c79. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:05Z), 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/HRA7T2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52f2728fc181961ba73dc7ce3799b1a5ef0b911eae24002bbf94caac4e29454. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HRA7T2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8f2582b9a5a130394171d6aa49513ed88a61f1f235648f9e773f1cd8b6b816. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/HRA7T2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521e2963922a679087cabc7c79dc8150e38ba04a0117d8f6abeab5392f403a32. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HRA7T2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f30569cf10457c641b9fed9d2739196bbeefc729acc2383521a58807f17956. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:58Z), 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/HRA7T2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f85661ef792f64736b1eaa0430997c5e4d3345512ea5f8f4dd02fd8ba58c2a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:20:45Z), 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/HRA7T2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b33f3623656e214985fc4da56b7f3d9edaf3a37032aa9e3256a5a4ba2fea27. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/HRA7T2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a1e5e10f075444326d3650a9cc4e21efa39a2d8f926a5730168c4f52560523. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/HRA7T2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2e810310c68ce14b5788fcc11832f9e375a42e033214ebf202402c8f74d1f3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HRA7T2300011.