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 0xa7652856fb46c9e12371bb757cb298f845900b0bb9f251276af11fb4b00d348b. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3d2a0cf-ffea-47b1-b04b-b9a5f7a82333.json and https://artists.proofprofile.net/proofs/artist/f3d2a0cf-ffea-47b1-b04b-b9a5f7a82333.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 0x9137c8fa8d271ecae0ba72b97adafccf9a0c8818797c67c6c60d6d6ecbff1aa3. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZMEM2155161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf303027d72ed7e0955e8e7f68ea997f084398748e1b587fc94ff30aa2c3227. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMEM2155170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e70a0c6724c123b877dca0638dc3308d6cb4f2e0f7044989543e4faa463754. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:10:11Z), 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/QZNWT2187212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e354e29bf478b24f9eb4198f8c66fa55db6d25f22c38489cf45c7ed2ab5a03. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWT2187216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afe94674ba10352f5d96732e91778bc81df08a3bb6e1ec6dabad7097fbdb506. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:04:14Z), 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/QZK6G2127314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2711912456ea909460be231576991ce12c63ddc3604c91e64b6ff1b9f3f49f. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZK6G2127315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bb10d7fad43c81a9be850e50a06b165ce244a0e9ed6bb2b99dd5f3facfa862. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6G2127322.