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 0xa957f126bb136756ef0a445af34b5a4bd902c918052abaa09ed3a7d946cbb9e1. 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/28cf5ee4-a4bc-4f75-8820-7ef7670e8be4.json and https://artists.proofprofile.net/proofs/artist/28cf5ee4-a4bc-4f75-8820-7ef7670e8be4.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 0x749a3d59f6ea5214df66582423141b0604055c5ec987ee067f0889f9e1a63360. 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/GBKQU1610214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04defb04ab38d3df225839594a68819cc244610242df22124492faf627525b6c. 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/GBKQU1610216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f12234a7e9595af2d2d66aabc347191499b8d16aefab785404e9c3179205077. 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/GBKQU1610217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7ce83eeee4f3f867f9a7bc8a5f9d11a6f6443e3b86f1c01fe6f1228bc79069. 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/GBKQU1692926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c5ed324e9bdeab2cd3e83340986fcb47579b1d8f774d4ff39e758fd5492eaf. 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/GBKQU1692927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd881bf7e5fdca2196e3d760d092b40b4ff474199afeb60371fa4e9379c26d521. 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/GBKQU2074024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d1f771165baa923b1c1d1e193aaa7a16d1a5323d6377d5b20407bddb712830. 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/GBKQU2074025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d75ea29d94e5d70a9f4d10bb15b13d99dfb97c39cd80da0c4d97da083d87d3. 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/GBKQU2230515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7e46617a3a4bbdc5bcd3e3ff5972c5dca179552825ad67e6807b8257666627. 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/GBKQU2230516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd80d94d460f2b59ea15edeb69572932096fcab4e61601ffabce27676697381. 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/GBKQU2309676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59143fc8eb1988bec7924bdc4533f0f228459b42da9a962e15a9e945c6043935. 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/GBKQU2051758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111d26479028e87468097c0bc15a464a759df4ba154078a0a49d7fc2d39af8eb. 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/GBLV61711913.