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 0x84f464c30d2a490cbcd7ebd9d642dfb6684a169e4b353999f480380feceda0e0. 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/ea65b8bc-f7cd-4d33-b068-863cdbb7d51b.json and https://artists.proofprofile.net/proofs/artist/ea65b8bc-f7cd-4d33-b068-863cdbb7d51b.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 0x33eb9ffa0389ef0e970c7ac046ae6e5b4c38df7e51aad162a90706eb8a91e181. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US4UH0788101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a36fa6d3f42b92e8452d2c3f9fc02834105ebd09f42e527e16155c24da089b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCABN1394592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a8cc03b208e65004e69250a64fa7b628bec2c84ade8345a7dd0d353caa2c1. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCABN1399406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82702e35b6b1feb0349b620eb84c01c2897e02d54a51ae9bb7ad36cd6368d926. 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/TCACK1549063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9614b32f12d051d057a9cfff9f4fc4ea9e91c206d43b9fd298624be9126e0a84. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCABO1306757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc659cfe7cd01aa29d715dabaa143bd428a4a45a78f06b61583b143e4ec4f4c. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCACQ1644817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cac2be9ba1d50ad865be07642aad36946551ca227cf6b72de639f26bc4f0a47. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:53:24Z), 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/TCAIO2449344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd26a11e90e27592ab3b9fbd12c3053402af9515defd9239f8de9b89570d26d4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAIO2410108.