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 0x665f863a1cd5aaee4c8aaf4fbd994fe20c4fecbb671004f39b8aceaa46d7b5ec. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f019d19-f474-47dc-9ad3-64564bd01218.json and https://artists.proofprofile.net/proofs/artist/9f019d19-f474-47dc-9ad3-64564bd01218.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 0x027b87f616d6c7109e08ce7fa4fa22dff2ebf9379c441c6af143ebd27e7c44d4. 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/BXSO61700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad7bde8bd1b6f7144dc03254afcd89c9f8c47681a98800ed8eb17a2934661f0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:36Z), 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/BXSO61900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b038d1839450fa8a307d51ce47efc599b7604a3881916d8e55fa5bebc82b344. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:05:14Z), 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/BXSO61900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac08938315f3cbdc132bdd0c3d8e0ad999617646d548e4c602290e16f3f53070. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/BXSO61900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bc4fca936e06b6d8ed055058a774d2d995b07c51cdf90d40149c27a35ce069. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BXSO61900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddd874503a62989852177253118e5d5f474c26cb0fb9e266e34156263bf7ee2. 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/BXSO61700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7747800bbe073c82b9a9ef2bc991298d9a1ab761c16355105d4a5f3fc38fe8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BXSO61900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4e2020d5bc15cc9bf13556ce0bc9cea248c31a8947923ddd87eba9dc99c023. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BXSO61900007.