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 0x5b33fadb82bac2b1076cf6e0f5a3923b58fc4eccfb1b037b98925344ea772cd5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a591f442-5f90-4f8a-b125-546054283930.json and https://artists.proofprofile.net/proofs/artist/a591f442-5f90-4f8a-b125-546054283930.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 0x1428a517b98375e1c896c55827cc1c9c536d94e72f609cad2d23ae0f9cbd1549. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEQ2070114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477e0e8befa1ee4b778c47ebbbfbb84f0448d7b94369a1d4abea46fcdab3b2d3. 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/TCAEK1983508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7042c7d8a80b4ad5e121423ac06a11c5f5a0eee3fae66fc016286e961c05f3e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEO1945679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c8887ed6ce2a133c7cdba714721d140ace76e54f14f0f3aedf004069b961d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEI1944418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15c5d36bd500cc8e627aaa14cbfdd0ab0e1bb50576a3052959289a2a8285fd1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEO1945760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1da5f5547ce10614de19044a08897ce35c9e4477038aeb0dcf6eb2fb6f2efdb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEO1945686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f95bd55a5b3f75c6642c3449d158658eb3530bf22118ffd02da0f6a9ff02e52. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEO1945690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39bd4ec71053e64eb9649c04c01685acbcb40da3ce75f5d7ebaa7968e2bde1b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TCAEO1945691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1714702dae4d9b48ff2ec776e70b7e0e2ff49396e980b5d6f4ae80758e77570a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEO1945694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6b7382c5b108af2826df1bdc23985c530f36d1e79d2b805c76c3d1af1fa706. 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/TCAEO1945698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26be4b13f6cee74ccaaa9d0c365fff5f555064185fd6a643d828eade416b4b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAED1930928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d05220fcceef4ec1be7d8aa8cf9f7ccaac902d7d256f93a0d856aaa3d1fc35e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEO1945762.