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 0x681d372302e37acca112874bc1b28fde2bf15746be652971516f6dc4900230dd. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac8ccdfc-e551-443e-a832-fc8f0bdd624e.json and https://artists.proofprofile.net/proofs/artist/ac8ccdfc-e551-443e-a832-fc8f0bdd624e.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 0x1367e361a0745ae1573f8f253f81a9213e9e1fec8c45e625f64494b51d2fb462. 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/TCACA1446397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba379f19fcc6c98acc99f72ceddfa59a8c4f0eb327714541b45acc9ac88ec7e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGA2284953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662b8b065640d4b3b41a867fc8976623d277d44aad0dfa2a10ba44a6bf0064c5. 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/GBRKQ2556053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1808d4c93d9faf8cfa1858bdcb3420966dc56d87e9003d10eabe0a5ab8da75e0. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:44:40Z), 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/GBRKQ2556120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849962732bd8979b58685da48fe5cd5db452c33c2d82a9c95fd0056106cdd759. 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/GBRKQ2556222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cb5d15e09a37e9bef22d306847c944565bf9bd0a1a3c634bf1fc09730d6a45. 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/GBRKQ2556254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ee047a2cb9e4ae04c30e005d40a0d5363eb5eafe7678b4ae5ec38eb2064f29. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBRKQ2556281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa286d2ebe7a354a2951325ab4e34b5b19203f2a40e17f31ea42e357ba4c2b8b4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBRKQ2556293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa485becc4c051e9c4433cbf3ca981dc109940c79fdf65ea9d2552d05a42f9649. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMZ92252648.