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 0x5933d071004ef0c59e1248f177f0ec696ed3a47c421ec1840994ddb75fd8c6ae. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bc33063-a61c-4745-bc37-fefd632dc5d1.json and https://artists.proofprofile.net/proofs/artist/4bc33063-a61c-4745-bc37-fefd632dc5d1.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 0xf0aca51a83e2ac264b47e88633d94c9c131ee7e8759e6a28f777ac304bc20fa3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:59:32Z), 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/ITFJK2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d1a01e92c5a83019c35581fb4e98a13b39c0eb4672b98c9e6cffe5eeca1bb2. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/ITP842500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14939db9840e9e35be1d67fc0b342aa11811eb3393a32b0f4068030777c83570. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ITP842500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efcb5042f825efb682b68eba6c1e37842e02dd33c6d01430411d4ff07859193. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/ITP842500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04447b2e8eb5c0cc59d5cc684cccf9e40f75c2ee778cc3ca5fa1fb45ceb78cc. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:52:29Z), 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/ITP842500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568b196e8b86b6fc0f4850b1dffd9c50302423f6c627c89ec9c238dd516f5e67. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:55:30Z), 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/ITP842500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7319445d828c0f0875f8d97ad83ebb85d539c5f277c5d780ad8b132a972b828c. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/ITP842500035.