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 0x19d07c8f4d339eab376162b1514ae535808f4cfe2b7d20e4513c4c47b80a1179. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a3d3963-8d19-4bdf-91c8-20476d556cff.json and https://artists.proofprofile.net/proofs/artist/8a3d3963-8d19-4bdf-91c8-20476d556cff.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 0x8c5de12a9eba94958c341d834d28407dc6edd09d869c4d9fef5c8369fd8572a7. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:37:26Z), 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/QZES51939895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f2dd2806b20a0eeba1c094145aa8861431bee262c1e152a38aad1c74fa6bb7. 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/QZFYX2059109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6aa441f89d9266ed27c76086afa8339b46a86863b6533c72cd03a058f14eb50. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZDA82070968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418520a6dd99e55ec74e8e1460964445cd1b07eac76bcac4bbca0b46bc31f1bb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES82063545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe059668f15872761601992313dfa342666e2185415ba16faf3b1d959304ebf78. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ62152395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17d9d6284bb5d3827778194f4d6f033c9bb9d18a4959192e80bebfc58816053. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:50Z), 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/TR0012100551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ccc5ccbb800574ac62c2af122b8c374f97ae1bb5e893ef520bc1edf411d8be. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEP2221572.