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 0x5b242d7bb68b813199388ff0a7fca86502304887f53e4615aa8cafd3cd16f0b9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/892056c4-428b-4ee0-8e8a-97ebf63a3920.json and https://artists.proofprofile.net/proofs/artist/892056c4-428b-4ee0-8e8a-97ebf63a3920.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 0xad4f26830c57ab52f0c267afc98e0ff24917243c582b5307831dd2d93480bc0c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMDA61435822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2de8a4f6d52bca3720590bd2e1388e83d4e33ecd89b270e0cf25a6cd26a67d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QMDA61435823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b33d7f98f700cc33f626dc8d714aaff20c45d7776f5f896ab953155afa1a0b6. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:51:40Z), 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/QMDA61435824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b627fd632707ceb4fc86848d0d4c3ae378e8c46690de1565b83f1dfbbbf4bc. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QMDA61435826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4c6f74083e2936c104b096c4ef8ca13edb6ab673b55878fc64588024eda041. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:07:33Z), 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/QMDA61435827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d9722da1b58fd33a107c105f13bc7a2e96c9512903413a6645489494e43931. 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/QMDA61435828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788b8e502bd22bf5baaae657439c6024900f7238109199681bb6da4c9f7d93a3. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:43:11Z), 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/QMDA61435829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a19df05cf434204e81e6dac961978bba188d052a7657b032bd05d9f47e10a7b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:46:36Z), 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/QMDA61435830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2d892f029925a2e7513f667c11bb36626954bc0f0a5c9190a4e9e066e831c5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:37Z), 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/QM6N21532092.