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 0x7742f84681df0529d35d794f4aa9f420aece34b90a2533760e4e24b72da370a6. 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/9f9e6e12-7daf-4f35-8c50-e49c3245289a.json and https://artists.proofprofile.net/proofs/artist/9f9e6e12-7daf-4f35-8c50-e49c3245289a.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 0x1e1c37cb0b9a208c46d54ff1ccb0be7d4e8e55e5693646328c49748b9e3b1146. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZF452002436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21e14d94f5fa956a9b1f1d4b77d9db97afb90a58507b3b5acaa9ead2a933c38. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZF452002437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457327a321d0c8426edafefa810536355673e53bdaf85931a526c8cd76e0d17d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/KSA002101036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c04dce0bc712178509e6339fc875647e7fa3316b02a6907d6089332e5583e4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:03:15Z), 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/KSA002101037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe358a7b23ab5a7e49789f7410109968e152fcbe605a4807308dbabad915780e5. 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/KSA002101039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f35d471a93c567e8e535843f75074f23dbb6c4feb331ad64b148ca7e773fd7b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KSA002300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb483c284f3c8acbd80295a927f3e4415e5fb1f478dcb7228e080989f1e117cff. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:36Z), 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/KSA002300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d262254758315836fdbc17e7c0e73f0c1c32269afe2703758f4371200b6718b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:37:48Z), 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/KSA002300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05340a7bb887db24959a8c96743e92309d6636a09dff7373e506a51970fabfe. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KSA002100776.