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 0x34d94a6311ae985a2e3782929547ece68f0095584c6797086f7a7bdaf46d0bad. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcb13cd3-168b-4066-ad37-8b7373c29be2.json and https://artists.proofprofile.net/proofs/artist/fcb13cd3-168b-4066-ad37-8b7373c29be2.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 0xdd7963197a9b78a8e0e33869238cec04cebd1e5d71452f25913e61d888fe40cc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJX2437277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8fdc133e5c62cb8097299f1cb965c800de89f2b1e204b0300e68ec04604683. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNJX2437305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0b91a1666885ff6b54de0a37b388d69c51169fb0670f5d3d356a97894bc57d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNJX2437284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142dab7d19822c24ff797389617e88595081de980a2697b4291e929f71a748eb. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:18:00Z), 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/QZNJX2437289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b804ed5a44cf9256eb43ebc26494adf5a90632bb7b18951be19aa7b22a20c9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:03:24Z), 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/QZNJX2437276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830c09aee23db4693f6cf106802d8eda132ceae6c4b8a85dccb34d7365ce8b8a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJX2437201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0e757fce2a2db5bd7d579afc1b850f8477e0f5e2318ece027d74a5b8d844c9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNJX2437102.