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 0x1bbc61730b4d0508549a2e08a33cb125679d5ba73817225ea7d1f70cbb288724. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ace5801-870f-4547-9ef7-93abc749fbdb.json and https://artists.proofprofile.net/proofs/artist/4ace5801-870f-4547-9ef7-93abc749fbdb.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 0x26d23dbe62436c4d8cf535d1b447742319f1a3245fc4d9a63d70b56931c69c82. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ATIM32300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a50a14808be01fd407bb48a9ef5dcfe292138fd58f83dbea899fddfc35432ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ATIM32300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b62a27a8e8df7e32ddb90f0a658fc12f95510453d80b6f74563a70508c48e23. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:23Z), 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/ATIM32300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763eb2beccc3412e0ef1b5055f1e30acb4ab39889a1d6a56ab7361766f8e97d0. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ATEK02577023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dfc1edc295ff4de69d065c52b24085530ccd716719cc4170ac273e1c57ff0c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ATEK02577044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8e8b9e61f1dbffe895eb35264d73bd60e71686e5c33f66de1859d5813ac3a7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:54Z), 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/ATEK02577045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa352f91fc15fecda36b43751aa4db70972b4e1a34695089768db701bb312135. 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/ATIM32500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d57f21a59ee21c539dbe7bfbb53eea573718954d4568f6ea724d59046c4106. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEYT72100664.