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 0x63507483f2e26c48c8d706d7e4ef45e6db8fc28b02fe9e81b5fea890e62adea9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68319c49-9da4-4e9d-8cbf-016c42b22116.json and https://artists.proofprofile.net/proofs/artist/68319c49-9da4-4e9d-8cbf-016c42b22116.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 0x6fbee8c193a3f289a98c9c990d810667f6aa6c8178c46c564094b7c10933e1da. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:39:23Z), 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/KSA012155491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb04ed77a6a7782116dab5ad209e617487b123e2bfbd8168769d91f92502da98. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/KRA382301688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8974d233578774172a4f60035c093f048ec8648d7f5dadbddf153c146b44dc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/KRA382319893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5f53c3224535bdbe24ec5b8acf2a8765bbe7de06d16a1cdbee3a31a219472a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:12:56Z), 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/KRNAR2378086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74528b150ccb76680f3a2af67a97f5b8ce6c7fef3f56c2ea795b075af62ac24. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:46Z), 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/KRMIM2424420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e20284f9e950ae4f61827db583556132e052061d73155ea3f4678f96afb685. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/KRMIM2482180.