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 0x3f0c39888d1ccaa5b97bdd7edb9c4f8a042cef71c9af77238f923f2a6ae411b4. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0013e8d0-b4fc-46de-ab9a-378220b86547.json and https://artists.proofprofile.net/proofs/artist/0013e8d0-b4fc-46de-ab9a-378220b86547.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 0x837c81332fd4d4d45a08f7fb7e64e745d80883d1b6345fbad01750a4be61bfd9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWDE2566546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d712d4b3257d7c196bde8334e9913d9426fefc75506006061f768b929aa1e4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWDE2566550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720bc0d0e7b8a3664abf94b145e15d7b97c26439bc4322618d1e7bf142f7366c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWDE2566553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074bf841b54dc3f5136a652fc1d5caa61f6a508a1a71d0186a62f9c51d9a1340. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:05Z), 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/QZWDE2566556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabde2fe5573c84a2bdd43568c74b879308eea2a055fd1ce885da740d938fbd9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWDE2566557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aba59ce49a670a728028614177081c687448d0a209fc7bf1147b506dbcf2829. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:02:20Z), 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/QZWDE2566559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1fe88565eba5c1f0c21f317acc2755b789fc27c57b372aa7485b8246ca69df. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:29:26Z), 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/QZWDE2566561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc8fa8de2723b13b2f2a3f0a0069e89a4edc443a03fc29c7a4a065d8608287b. 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/QZWDE2566562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b5c030a77a77406c213008d9c28e18aee307f63a09ed3c0b463cd732e03ed0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWDE2566563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a0852ed51125125ce05c12b6c53d697c7d6a9938f0b73ce347e388b44d177e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWDE2566565.