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 0x8d6f71db240a891ea21e5c18be783418a798870da21516564bf5adb2c679689b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d4c6d66-ef1d-47e3-a1bb-c21e4563e7b3.json and https://artists.proofprofile.net/proofs/artist/7d4c6d66-ef1d-47e3-a1bb-c21e4563e7b3.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 0xe4ea7c3d480f12ce930f2622915cbc75f0971bc402e18b3c4e4c7fa057fc56c6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:05:27Z), 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/MX4972138808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f84691a90788d44b72ba78eb1401ee814f8a5dff562cfb8fea683ee01b7de54. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/MX4972138792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eac6f248f9143acef5b89b81ccf263bee9b24fb1b205fbbf7ab25dbd15d142. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:24Z), 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/MX4972138795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e1972863e2e2d06d2135b1b125bab5a1b1cd6f2fde8e5e7a1ae32a4fbe838e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MX4972138800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b06531a7b35a3d0bc3f0bb5a11e3971f1c1554017d516eddb485973459b6626. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/MX4972138801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387690a9034e481280ddc280bf3107e586b91579f3ab170e5a0ac764496dbb86. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:30:35Z), 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/CA5KR2020393.