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 0x8a0094010722e6547dceb90ed73ea8d8357a89998e549eb8473c74903c07caab. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5ed1436-c6ed-459f-8b1e-9a8ae5514612.json and https://artists.proofprofile.net/proofs/artist/c5ed1436-c6ed-459f-8b1e-9a8ae5514612.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 0x776b0329cc907f2d5d7c4b9ca8e2d6f56c0f85478d8776223bbf8f1d219f0238. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZNWT2019168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5368d63169d43f5b8f5448e8af4aa7dadfacee34968dc97deea9753146103ca0. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USL4R2091541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9749ea538754e7f8e3a1b9aa3c28456006dbe90683170d4e8363794c177d1c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:37:03Z), 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/ZZOPM2105074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb06de4870fc026dd146b8a87c1f00ac41566f1ffa79f511bafd82fcf98feaa7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:11:05Z), 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/QZHNB2142199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c68a4cd9da6e208ee852a12be22ae1ab72fd90ffb5f1a3e2ea418195f94455. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNWW2165060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f6a366922aa4e1afdd04a5cc0bd5c870bc1887d8186b3ff3f98c98d0748f73. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB32344721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87afe431945544a71ea597615a5f4b26d4bbccd820666bfc033e63c5efc0375. 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/CAC0C2400872.