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 0x60defcb35d1dae8d30d4e3176415a77f0111aeabcf9611b8d166fbfcafbe3c7c. 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/e5eabbd3-2150-4dc3-8589-60329a417242.json and https://artists.proofprofile.net/proofs/artist/e5eabbd3-2150-4dc3-8589-60329a417242.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Valéria Paiva e Paulo Madona (Mpb Ao Vivo )
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 0xe6cebb1cd5a632979cd0d29b2e551c893e8902028b3460a05b4d190de8da4ab4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:01:26Z), 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/US3DF2127995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9a09d21c03ceef60650abbbff01505624d67410ef13df3fbed0339aff2487e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF2128059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa638ec4aea8b9e4778ec8ede491938b2eae2f53152e6f8781deca368ca0425bf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRF6E2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b1b6b88a54debc5c3d5735c293d009e32ed0c75e2f73b1d37e381125e6f62d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX9B52400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b1b6b88a54debc5c3d5735c293d009e32ed0c75e2f73b1d37e381125e6f62d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BX9B52400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8edab60c3351b9ee2ef0f9c96b32893cfc780d6837de588cc68fcf195a9e1e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRF6E2200002.