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 0xc9b31f0bfac77aa461f91dcf79a762a5b4669cf9ba9ce4388ead297f802f4c47. 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/75d30287-8ca4-4915-af2b-96e80e47988a.json and https://artists.proofprofile.net/proofs/artist/75d30287-8ca4-4915-af2b-96e80e47988a.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 0xc73a75b2946c28911d7a8839447c120b3ec7310412f0ffd47635a12069bcaa77. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA2M2278530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8097ef2b06f9da4ff0ee82a9be1908c83627b1c9fb01f1e94b99e85725f0c6f8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEA0Q2277022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc343f46ab0d19217e3b2cf924f73141a924de59419b43ef659cbe128770ee74. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:51Z), 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/AEA2W2356411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96020e8ace0000b4e55c538bf06177ec1f559113315bb5b916ae74634115722. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/AEA2M2341313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd124879b0f79d10e3023329814f2e08d9dcbb90f02167d7bda850928bc575250. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/AEA2M2382059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce18d028f16b92138daee8c712ec56d5a697b2bcc573a0f891aec16c43cae8a1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/RUA1H2470393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf1203ec3b7bbbfeb5074ae3b2eaa0b4cb8a686005f0667362aa2d281e29acf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKEX32430494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3576e212f80e9688dbdfa7707848180596b99d06a932c235c0989284abf5091. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:21Z), 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/UKEX32459990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dd3d65857a69fb01d3b446cd60239c54ba173c1c5eed3e64a31163ba50a85e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/RUAGT2567445.