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 0x448b2e1a7f2c5ab45a3e89a3dc68384aeab55b90bcb98a639a5c2618e6b496f4. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8cab357-34d0-409e-825b-dd5dd0beced7.json and https://artists.proofprofile.net/proofs/artist/d8cab357-34d0-409e-825b-dd5dd0beced7.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 0x07780c986bc9af4dcba7fcdf4736328fe09fb8d11f8e4b7003ac53e7b53ead3e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:34:35Z), 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/QZFZ22094402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ee8ae56ca6be5fa98fb64141f9e2e121b08b5c5c138340099949675b02bf9f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ22189346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4a83c8b7e4a83f13a20a185ed5a0247fe32dab1f9c6fba7c9e68877a3e5390. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:21:57Z), 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/QZRP42112528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042cc3e952b6b8de16fd7cce9add2ee8c75bb3b13b7d89500cd58c2c10b2f008. 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/QZRP42130711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26ffada10244a00a695f71b5fd3d736b977ac363310d1231c65a71240134f6d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZRP42162062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0309ac8b94124c7f681fc0d23f2e839841a38fa5f25b3bc8bccc67798a7a83d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZRP52109086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e11982080a76f2754ef8b217644aa3f05f501f616f250110a02bf606fea2f97. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:10:05Z), 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/QZDA52253945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0250fb0423bc618e2f6864c517e2f6cc712e2674ba2df20d932c41ff04a3dda6. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:20:18Z), 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/QZDA52292071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5497d9d08a6e37be5476fd4a0f40aae2077e36f28ad204e8765dbe4e5015a5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:01:08Z), 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/QZMEM2275613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616d3b30dac8ebb15caf49d592e8f9a4a8feafc100826b41554c5accc326bdb8. 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/QZMER2332965.