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 0x29fec95b5cb0821075f01d801b8ccecfa0692d307dd2dcb76da91f39f9e9b37d. 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/0e4ebd8f-0d9e-46aa-beb5-6f11edecdf2e.json and https://artists.proofprofile.net/proofs/artist/0e4ebd8f-0d9e-46aa-beb5-6f11edecdf2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Famous Singers, Pt. 3 (From the "JTBC" TV SHOW)
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 0x3358ba0192a1677d6fd02477f1ec26dd84d1e239b3d8fc4e5db91133e776517b. 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/KRF702100083.
Famous Singers, Pt. 4 (From the "JTBC" TV SHOW)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3af5496a7ac7e2fb2a7ec4f4096c45ca09cb0522c7d7014d941e07dfeff516. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/KRF702100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912131d72624a6b48d08d4d2fb5d8063b602a35e6c4cef1e65b9a7e84311e1e4. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:19:42Z), 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/KRF702100090.