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 0xd59564b94acb1e9105ad9d2e26d10099b98284b8874d1b2939c0b1d5d4840fd8. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf7b698d-e81b-4617-82c8-880fc94d225d.json and https://artists.proofprofile.net/proofs/artist/bf7b698d-e81b-4617-82c8-880fc94d225d.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 0x4ed01cd1fd73ade862d58fa95bb0e838090113946c8fb0cfaed829930e0ced7e. 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/GXH2J2592278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ec54cb1dcb23c01669a7f5d76b7a27fb48bb4870da27aaac1ff564be7a921a. 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/GXH2J2592287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05ee5267deb0e456562604f306579c6fd86cc18a305efbc15c7e48a7e01619d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GXH2J2592286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b01b6de2d98f835f9396fbb4108789541cfaaf8ff87e201ecc9fbd288d79309. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:53Z), 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/GXH2J2592285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3454b09cade8491570424f3a1bed3a8549345be8cf6826aea77f1cc5d7ae50. 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/GXH2J2592284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c62ac3f69996423ec8d50734f7ca38ac7842a6159803f4bf373605bdb2ce6e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXH2J2592283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1757b4979f2441efc1d093878f4fd46485a8098d166f6a79310169c88d3dcd2d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:36Z), 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/GXH2J2592282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75794625e64c78d3125c741c56c9bac6133af51ade9db1c16cc6d559c98b0436. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GXH2J2592281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8474f070c6fec2e461ae86ce9a61d32056e85cc258faa338be9a5626b5b3219. 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/GXH2J2592280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e881cce49e31d999cdd6eb7161fb8dd1ab1444da2794b69cd8b4f2ead9e0d2e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GXH2J2592279.