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 0x0d80465539003fff8d00d6b9b3513f5e005000a11854220b70b665eed1d99e3e. 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/419538f2-3d68-4cb4-8226-31ceee2cdf38.json and https://artists.proofprofile.net/proofs/artist/419538f2-3d68-4cb4-8226-31ceee2cdf38.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 0xa790a2da0c236cc083fb55b38d8aea03032932b3a0234084f2f70f526868a052. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAY641100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa2389c7389717761b550ff01ac89a1c67b7b87e05d4f7a91f14de4d756f15a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAY641100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d2abafb121e8a52f2331d210ed2188fa2d9bca59fed7dd356289c4d8a82fa6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:33Z), 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/CAY641100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f054cbf5531f94bd61520a8505dbdfe3a4cf4da8b48ed89cce668f906930898. 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/CAY641100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf2dbd3d2581fdf3ab22dbb6ede5db96978932dbb6351d0453a1bda2e709cdb. 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/CAY641100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3950cce4eec8f0a4ab0680c163ec42680f30953676d4d52ed2005a7911f368. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAZ9Y2102241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3497873a213f96b1fce0078d3304c34ec0925e0fa9656c9755beb3d35e63787a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAZ9Y2102160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3d1058e098d1996ba8722c2b0a3801c071be7d7dbfe628700f1ba7dbbbea6a. 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/CAZ9Y2407150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d04258e1295aefcfeb209a8a27e360bd699f8c53b39026b99f9f7663bbc7092. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CAZ9Y2409240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609cd2796fdb27b49663cc9c0e8ac06304408a33e75febcba33d1a7a438b9523. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAZ9Y2502110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfc6fce9d204940b3b3d2af7464eddb328e6780467047a3d54d5949fdf3383d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CAZ9Y2502113.