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 0x6e994d7f9a5fd2bdaf2cab3cfc3f0760b9abddfccf9e1b9d13ae4a9e29a34489. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c20f8119-9c07-44af-81c1-c136902289ef.json and https://artists.proofprofile.net/proofs/artist/c20f8119-9c07-44af-81c1-c136902289ef.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 0x41b3fefde0fd35cd55a1d669fb27de2112a3809296770aa92229e2a0aa9f1e15. 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/FR2X41620374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ce808918c2af72e016506f46580ee9819a2be5cefdeb8c7cde9b893a2e0d8e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:05Z), 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/FR2X41620378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbbbd5735135b096953c598fc62580f98d81568ff314d1bd983df0653dc3710. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:42:29Z), 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/FR2X41620380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed68146e35a6bf7a872c3f66221a89a2ddfc401cbacec91f2b0f797d40e9d043. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/FR2X41620382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0407b80baaa286225b492b4805caf83539969765f144c70aebb60ebfb665b4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:41:27Z), 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/FR2X41620385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e3ba0c49d81f0824d3b062b76aa5279ec67d79cf7b30d01a31abf7b9ec71fd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X41620388.