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 0x70a21da461aabb1d82f6bb415e41adc9b46cebaa2f54888af6a51c9065de7357. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50332002-7fda-49cf-8196-1c4a151d94ee.json and https://artists.proofprofile.net/proofs/artist/50332002-7fda-49cf-8196-1c4a151d94ee.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 0x24731c6413726e69b55f0f3f8c82b8eab1dfc4e4c44dc38f732dcbdd48069629. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:38:18Z), 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/QZTB72467515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b56b0af9008d8b73f2444923f3db8ac7df3207f201bac151fd03eae5216d65. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEH742442948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb969769972cb1f2f66df55773d0490516930e512aacdbc6c2c6b95e6d354ab. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEH742442950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed431b87a84e2424e431cfc8be0d69e9721f4bc74d4ebbfefefac612fc08ccd6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEH742442951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfa6dfd9bfe71f4278bffca22b2e85f71d6db92c5667631add775016ebbb126. 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/CA5KR2517495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830f9b6e93c724baba9bcdd796336c5b0e016438dd156801ef95ac708e46d69f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR2517496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd417396638b4995a4aebfef2699919769fd6e171971c8ef73f6225bca794526a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/CA5KR2527214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a6d3cec69145f45e75ee0138d328684961703109539e93720199127f0fd802. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKQU2547578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44366d41047887158ddbb9b73a8215912fdd489306ea1656bbb5fd4964e227c6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEH742514501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbedd364e4045e321fc557a6478f5431a907b255cd88436d225c15c43d028ff1. 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/DEH742525665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9173956f52c5718a44e52e5d9141c2f8bf5f3a87f4d1633c34d5e1ec11061c54. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ792597846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa82da589a563843bb6500aa383e66733ec0921c27e07bcfda185b2e17062a3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2474261.