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 0x37f095ca8afb927b49a4da3fd8a85d94253d3436e4b00636ec4c73da44ab4129. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0eb2498c-8a06-457f-ab75-8925984d8b26.json and https://artists.proofprofile.net/proofs/artist/0eb2498c-8a06-457f-ab75-8925984d8b26.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 0x9087f942698c03d926f677f2a344797bf33c3fc49935b42376a694d512c774e6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:42:29Z), 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/INN2C2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d6e9dbde6eff62f99699e4d89ca0a894f1492294b93d28f5d836d4edd9973f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/INN2C2400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035f452673d97d6d06a8b3efaa50947b5f1f1489788a21c6c9df3ed6e13f2fce. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/INN2C2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d53299345bf16633afccd6490f2d4c630d3ac932422f4e3c0663dee89bc26c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/INN2C2400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5503a5af199670c6d45fbfbca32e9d057aab2c8b9c66c3a998dbbdaa1447a43. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:48Z), 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/INN2C2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc51fe3732a6c50ff802278d06226fe00110bb0138e0a4d237f1321b24f013d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/INN2C2400159.