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 0xa1422606bd6cb75dc433093b5522f9a10f2da5df1a9788e38cdb724c4e804ed7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afa89ddf-32b2-4704-b9ab-1d8d3fe5538e.json and https://artists.proofprofile.net/proofs/artist/afa89ddf-32b2-4704-b9ab-1d8d3fe5538e.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 0x2e19f1e4cae9af96a57e5f6a0512be3e0a05225b0fe0f8174ac5b87f43f1c6a3. 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/US7VG1910797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b0305bb6967e95f194be4bed32cddf210cb3b80933767be8a42032f40b61dd. 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/US7VG1910798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692416da353c36aec7c237b6a68a2e22a0b66c818400d922516a3cb075d12d1b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:23Z), 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/US7VG1910799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136ad89f5d22abca35acda1f7e8d00df3fe09ad256bfc2db8a2bcbdc5ab9b172. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/US7VG1910803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5a988ff115efd713a4e9430f8f144a562da4a5e2bd0a4365aa25fbec39fe8. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:47:37Z), 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/US7VG1910804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401becde36583c4bd240e61f62012adfc1f14dfa17e3079ef274dd5e3f8f256a. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:43:03Z), 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/US7VG1910805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15d84eef516eda6afe636ad5c97b2f8751553912d0561d83b27e533dfcfb66c. 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/US7VG1910807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b86c27df86fa088ace37e2b907a5eb57e8cc3b0967c997d4236d2fe5affe2d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/US7VG1910808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79e15d0b5121a90373ac5692c1ce519cc196dcad9a77a5a92016a937f240bf1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US7VG1936888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d26ba7d9a166299ff89b405f4980ec01138742e7d25ab30995602df2bc7dc6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US7VG2534484.