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 0xd3888bc58820950ae4333c9b543cd40be059a13b28e53def2e7c6de81b02acf9. 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/21b2e1d6-eb22-4883-9492-3f4085c7c3d4.json and https://artists.proofprofile.net/proofs/artist/21b2e1d6-eb22-4883-9492-3f4085c7c3d4.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 0xed59f74f3fb007b2e23176f9bad25d508c9874fff0903f3f4080210b2d9842da. 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/HD6262625255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b4ad2e0616dd9043f51d2b3f647d0c6070d665558f28e5c520cecac8682203. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:00Z), 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/TR6477568934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1767762d3b144a2dc7635dbab56f7576befa6d399ac8e3220c3fda5ec25db749. 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/HL5784557053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ac43fe54044b1f1eeadfabceded765e34a562ebd3a147df4ebba8c82656027. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NL6384503625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d217664400cbc89bd2a7efbbb08070f984bbdfab934580b2953d7d26c1b9a6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:02:54Z), 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/HL8391525376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d42b71c0dd9cfb456fee648bd846c6beecd4521f48f5d5554138d59f0f4ecd5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HL6491154015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81050342af4f1b78337970b8e1100e072745ccdb05984d72cd2c8c0d83fb01b8. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:13:57Z), 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/HL6290263916.