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 0x501e0693337fa5321bb513a8a53ec612e41a12a9aabc5da1acd713159c280458. 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/8c4355d7-b668-411b-b70c-3ba319388a37.json and https://artists.proofprofile.net/proofs/artist/8c4355d7-b668-411b-b70c-3ba319388a37.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 0x2643242808c65dfcc615a740f1ecab822664b567b90e2b302e0c680b6b780774. 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/NLA6A1300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dfada2f1ccd7e345179144114363ee90e797d8172ffaacebc084002d7be805. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NLRH11800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d3ac2b8b5fe76861d4b6ef711d6b4325502ac38ebf9aec2f588eb4eb1147af. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLT811900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d3ac2b8b5fe76861d4b6ef711d6b4325502ac38ebf9aec2f588eb4eb1147af. 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/NLT811900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2843897eb198cc0cb807012b197271d0c9bf5e3fda4283e3d0ea17793e64416. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:09:28Z), 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/NL4EN2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85fb29f8a8dd774a565995c7cf50811c33d27176c623b4a6ff1f65e7e20e07b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLWW82400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7985c1c5f863b5bc5cb137f5ba188389b36471f50945a6aefbeda7f7a66686cb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:38Z), 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/NLQ272500054.