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 0x5fe1836c830580cc9ab4a53282b181fd3e0b6d1280ba8f1e93cbcaf5e4d71c75. 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/1b1d0aa1-5307-4df2-9ef2-4811f64b3812.json and https://artists.proofprofile.net/proofs/artist/1b1d0aa1-5307-4df2-9ef2-4811f64b3812.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 0x8f5f58a751171d86c3516603b46f30eb29790068e967d917a39a85f716f3ab5e. 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/QZES61875232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6a8a55ca0c385c23be243145b75db0bb7f8280794f9ac8854c7ca35ea41e55. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:36:13Z), 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/QZFYW2032382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db686d126261d814f8badc410a2a82f848127b71ab9dd0914817db6429aed90. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZFYW2032383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3662cb8c506828ae813d10bdf3f486037f60f8408f1ea89a74c998e42ab52198. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN92154518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105f4e24dfff897de630fa9bdba935f570761151ad85e775cf3010458c2398d5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN92154519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76994358f1a1a55930bf4c7c2b918333ed6d2bf7d4e7009144d8131b90a9c07. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZHN92154525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb5bbe73b4c10ef18eb662d70710d52e21d02b51259054ed65b07f9c6b1b4da. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:31:29Z), 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/QZMEN2116751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddda228c97d6678ea7ed4a444c3a59aec925fa207f1dd7af1d0d3930d0316133. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:46:36Z), 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/QZK6H2452439.