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 0xf6d9a2949e216a097f4d6fb90618a7eaea28792b3a1e3848ac5cf2549b929dbe. 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/78e10a63-40ad-44ac-8b2d-13b54a711fe0.json and https://artists.proofprofile.net/proofs/artist/78e10a63-40ad-44ac-8b2d-13b54a711fe0.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 0x84a6c8f793af17abd48b4595badc12bfb569b4fd3925a117a91cc5a30e5c6182. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:14Z), 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/DELG71400844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a5ba9dcaa176b09b05eb0ffdaf62536206223fba756378aa09128175eaa78d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DELG71400940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1fcdf60dad9e002dccaba97c63b524f64f99b7b30f6582ea24fe80cdddf678. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEMM42001162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810aec9acca0e863e3d1d8d92a90906054252c12f53f142abc1a549970216281. 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/DEMM42001165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a95d1e0da5558a4b6938743b7a75013e75458056115662737d0e30a49ccaf3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEMM42301220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c74c716eca9eb1291df18e718d32ca648ec41403158a9d78c1b6ebcad09adc8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEDU22300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357ee7db7090f49c62a45383ab4750ee55a12e9e8fc8c84eb27d316961f078c6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLCK42220252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d17de49fcd5baa1bbcf7f07b7ab1cdc6d9008a6ca8eef713aaa17f1d2ad639. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P42469401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33102a1d9406c662c97e31c7f7d9e2517da6e67159f282b34f2b604f8957770. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DECE72402465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33102a1d9406c662c97e31c7f7d9e2517da6e67159f282b34f2b604f8957770. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DECE72402465.