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 0xc201b4d6eff81a7ae07bbb2af990ed03ebac749944ce490b9e5edaa6fbf3fda8. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b88c5fff-b878-4189-8610-04bb1ca72db5.json and https://artists.proofprofile.net/proofs/artist/b88c5fff-b878-4189-8610-04bb1ca72db5.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 0xbe94763b9f7b6f6c064caf43e5584ab7860f48d4dfd89235d23bc920ef3a5549. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:58:52Z), 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/QZS632510841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457540056c35cf6acd4c8ef1995e17ec6f4fc25c9f1b1a36d214a5a088b2c182. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZS672551780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7c5a3627ca2df682d9af098b4129be8d154c48155a138c8ffd4307dbe660ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZJRC2553631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67330193535b1a1986cd0c658516ff3893a4a66076cca4812664de6e84a58ca. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZS652534568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897cabfd60ebfb4cbf97292d8cad33bb9a7c0a4d97791c2973e549027cdbcd02. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:22:25Z), 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/QZJRB2564490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0484d1e11075188e3dae9bb0121a94d45810d6ed9ea675aacd236899f8112ac6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:17:23Z), 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/QZS672532043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde56ce93548324362df79a7f996b7b005f6234bd9b7dc288470ee5115dbb9fff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZJRC2559843.