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 0xbd135d1f181dad185e7b6287b794bc792525632643f7e79a1fc71eb24a68e6c9. 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/c803e9e4-cc42-42a0-9473-299fd87e8522.json and https://artists.proofprofile.net/proofs/artist/c803e9e4-cc42-42a0-9473-299fd87e8522.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 0x1f93df62747997d186e64c4cb458b2ec8f12f49915818e53d2cb3335f25222dc. 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/NIKIT2202942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7ec63d5646be5da21c2d9af8ed814130769033007ab57e75af829dd224a056. 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/NIKIT2202943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cb6bae801943e082097a31348b914bc507cd4edd05cbc76eae0057d8de7759. 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/NIKIT2202944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3704456124c20ef9422a03c6ba4e570ee30cfd9b19cb391515764e511eec419. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/NIKIT2202947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4c8792d22c24d07a22fe3e581a153f4ddb841f9a81450a1d994c90c6280ec9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NIKIT2202948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09006278f9548c4f37e47dc256b830bd1fca04a2582c40a336745304cebb95bb. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:49:58Z), 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/NIKIT2202949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800826e427e2290ea86c0424096de25063b5671176183bd04d3b544baa9c74dd. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/NIKIT2202950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e123ad0cb6fe7e6d55b91ff060c0f9ef3f6b04f162872c51f901de072ab2b4d. 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/NIKIT2202953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9963a23e32af0f1f19d4b4948f58090752d9f1687ea8420a34572d124248455. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/NIKIT2202954.