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 0x54266c478ee6bda525227e4f1e94425603157e009a24a33c72262491e6549b0a. Chain 2 (Bitcoin): anchored in block 953961 (2026-06-16T14:58:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27ca2da1-8c87-4247-b5e4-4f1fa24748d4.json and https://artists.proofprofile.net/proofs/artist/27ca2da1-8c87-4247-b5e4-4f1fa24748d4.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 0xcd55ecd6631c22d38e3e92e64269fb57789061d8ce7c3bc4b669886150dc3064. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZK6J2331849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3415584eaa8412526cb0fbd504468ded29078e96983e54e0c568f8e4e5f6a36. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTAS2577315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01e09e683886bd8390a08d4f5ebacd3de7478de8d7fc61bbcd74bee37d47275. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTAS2577317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b1a52205915d4a82bbc62a742296c9ced56d3375a5a6be241b39bde5a83c27. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTAS2577318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868870ec796d7894c60db1afe9f519a0da15cf13931a5155ca78dabb569f7d29. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTAS2577319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99701c2cc302adf11616c1167fe6bfa050b41218925f745d6be2b8890ff0bc2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAS2577320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe91aa2fa70418bf5f3fbedccfc9e07961302fb5ec12fb19f20382a956cd9801. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:01:49Z), 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/QZTAS2577321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42ea06cc030df6a5b7c017a924b823608552d395cfefff44c1d4f3962deb71d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:59Z), 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/QZTAS2577322.