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 0x10c2ec850376a0db773301830afd5fc95a8c5c88717e096dfb85eb08dd316cf1. 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/d2c63a23-483d-4ca5-bb71-66c9e10ba67c.json and https://artists.proofprofile.net/proofs/artist/d2c63a23-483d-4ca5-bb71-66c9e10ba67c.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 0xbc19f4ae5591ca0389815135506e014188b350c00430f8669ef73d1c8456a842. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:22Z), 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/SGW502347768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b67230b76c898a5ceb9deb0f469cb4857a6084d5c46493466c4502c1ac1503. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/SGW502350529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c6338e5f7697d4ae034b6c81f70b2dc05698d8cfffddd80e6ea9e272c1de37. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SGW502353849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df39d7ee4055062c6fa1a7d97eafd44dd180374fecc3f28f816189e434d06dc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SGW502359801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9267bff100a90f4e0837fd645e6427f18a19940f42df56181edaa522529fc1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GXBAV2353229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320bef642258ad2e72dd775fbd83a3fc608f244a7f7614440f576c7a3a673fe1. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GXBAV2375596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309708f720e8ba6b09005b8d9d381b5d8c27cfc14b4a3926ac5ffdd1ed6b3445. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:51:50Z), 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/SGB502460031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce956e6bfb8d50cd16439ee58cdda93999aa051ce48a7c49991f34086de45b8f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA082444688.