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 0x175a880d7ac7672f19fa39e98d7427185d3027421374484f02bc4b969ebcbc77. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a12d4075-addf-41e0-8f17-7d530bb3d123.json and https://artists.proofprofile.net/proofs/artist/a12d4075-addf-41e0-8f17-7d530bb3d123.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 0x25689af601771d9642f98e9d2c315ad672f8c3fcdf20b8523c55ff1a2d0f6e4b. 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/QZP7F2506238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1fd8adb2b6c14b8e68fff81d04941931dfb37ebd25715a20c9eae10317b8bd. 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/QZP7F2506266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b26618c810b14f4ea07cf353b998532aa99676c6fac8cce5be7d0f7249fcd27. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:39Z), 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/QZP7F2506269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500d4f5ae49b2d06a90d1f43580aa60a001fd7f72609c64eff181233e6d0829f. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZP7F2506274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc98bc75054728b7502b5c8e8adbbb89cd4977e248ed2e098166819c9205b546. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZP7F2506278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f09e76e243c978b676ab866ef0f39dc820481156735a6d8309fe0d911834d30. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZP7F2506286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca5f9ac92b18a46806a6351214a5a5f95e59be6f2da76dad5f8dfd72dc92f33. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:07:37Z), 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/QZP7F2506292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3869c30eb951c2734b20d8aa98c41e3d0931671add0018fdf073fb2ed2f9eca1. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZP7F2506293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6077ab479baac0afddeb6e8707f64801cb23f0b59bcbe98fdd969fd7cfde2415. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZP7F2506294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dcd3cceb4b2f2622221dfa534741f02611fe8fe513376ea1974431e8f1dc32. 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/QZP7F2506302.