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 0xee9cc0a29ad91e13fc745bfb6f0d8fb17aec2638b7a8e25f245d24d30942ff4a. 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/cc4df1d2-5f6c-412d-9b2b-f97be25254f8.json and https://artists.proofprofile.net/proofs/artist/cc4df1d2-5f6c-412d-9b2b-f97be25254f8.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 0x5102bf97e3eb60127b512ce042d79f013567710f4d0dc6f69478f6b5bf1c32f9. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/ES5591700223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf993982b30758dc011f3e15559ac9d54e95535a799c52590284c3e87ce0a8b03. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ES5591700229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84d124dfd01844a9013657e2c74609b0fe84c356044c300463656bef103843c. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ES5591700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454b0c4e3528cc0936a11308de3a7fdf2b980bfa7f1cdfadd7eb3f6c8bca8b86. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/ES5591700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb171363584c59eeedd42a2b86ca33bfd70db1157751626715ee4c129d610ee9e. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:38:23Z), 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/ES5591700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909984b2357bde87a26750cbe01bce90f5069dd63a233334765c8de8d8190835. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5590600186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ae05409a7d524a16de8b6e7e1f7a71d35b51dfbc8c79e5c04ef152432c571f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:36:31Z), 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/ES5590600193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dc9442b8b5290a9d886cdf393bdc283a3d57e79abe756236d004cd76080f28. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ES5590600442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1f4a014aaeebc0b66c548aa990716a8f2133dcf874712d8a74e0078366a352. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:53Z), 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/ES5590600452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf961ad3ce45dfcf59e1438263696cb9a5aa194e3541bdf77576fe56e1d9e65e6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ES5590400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72457e259c2d10fe169334664f522e33b1aebe5c983b76a1ebc8f229d1edfdaf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:57:08Z), 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/ES5590400381.