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 0x22f9b35971d8b13c8894e0bc1f118b43b0ab64ab015d6e8a09d12ac326e3c89a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56360495-321c-4056-acf7-a45bf2e038fd.json and https://artists.proofprofile.net/proofs/artist/56360495-321c-4056-acf7-a45bf2e038fd.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 0xc7f5627925d467b665f6b7d965abbf7cafd5b480470cad25ea86210121ad508d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/CA5KR2295296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e601969ce6561fb4ffdc73a54a82030e8e72c2500a83b12161e01a0ff74d95. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:25:14Z), 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/IT2VK2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d692e539426cc1deb350496a88c37f897ece96dca66f0d98263579553bd451. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:28:43Z), 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/CA5KR2354704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467ad8480aa60aa3d707d6dc8f2f021b7caf23ee34cb8c9ef042bb3f94b717f9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:12Z), 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/IT2VK2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1778fbe9e431a760fb91deff5d1e2ffdc1c0f74b176d5fe74c1554d87d47d193. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:45Z), 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/QZWDE2314099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772009bf20fc7c4c8a0aad532c5e8cd04824bf8ca970c218c82ab391481c3c9f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/UKVKX2400001.