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 0x633d7ca16cefa9a3329f9dfe27d21ff4d314179e460a08231d06da1fe7c695cb. 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/fdca2206-caa0-4da0-b07a-183d02391a0a.json and https://artists.proofprofile.net/proofs/artist/fdca2206-caa0-4da0-b07a-183d02391a0a.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 0x6300a83c2d65b10099afb378594cf69141f7e7aa90df75db64fef2857b7037d4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEM1990019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06d03c9928d64f05f25b574de87c6364b15b964a003350cc198e56c226d650c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAGD2216196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb339920fa211dc9e7c2641a08049b9b059c227ea8ec4b078da882102e88cda4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:47:20Z), 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/TCAGD2216532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09506142e15974b8c9d60ef1f700aeab9d6e7e125cd2e5ca06d497a086358960. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYX2440236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f9d4c759ba10b4bc20d7dff3d953e0b80c9196b34ec03e8ae6357a7cb47932. 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/QZZ7M2402608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0ea6488eb762441a5510b616f4ed2f7f0556f99b0342bfbbd3f1e77c21e6f8. 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/QZZ7M2402609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d15c0d6c75e07b0da3edfae4ed0ef0a5254c2ffe7a7c2f422386b14854de785. 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/QZZ7M2402610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033e820bbfec9b05586f6dbdf7e203a887d3789276ea71b002b6052a8be3fd6a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJE2540094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2f0df55472535f888342c390e6933b53d211033436b435699c03ffd485a726. 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/QZHN92530422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa343da7ddb8e9d5beeea16962711611f7b49ddb75a6be41353e195124307c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:34Z), 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/QZTAT2513419.