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 0xe35cecd4bc0bf9615c7fb0f7e2744904b9ce99c02f1d395e5bacc81c09e8453b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84f0c0fe-fe06-4079-98bf-bd62b9e06ea2.json and https://artists.proofprofile.net/proofs/artist/84f0c0fe-fe06-4079-98bf-bd62b9e06ea2.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 0x3b4f50902386e095133a05e3ace4483f49fd668c2853a9cf909b1262d5c9556f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAIQ2494319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5867ce0d22dad676166b96f38aec3ad4c8f02fce27bc6c8587834cb05d75f5f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:19Z), 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/TCAJE2587748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e1636e63b3b26468d1c162282ac2ff5e522d775ccdd8d784034434e9d62fae. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:36:34Z), 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/TCAJI2512025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb808b4d1059604604e2af32d244ade4c5288761285d26c05a5cdadb4d5fa276b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:57:49Z), 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/TCAJN2508398.