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 0x13ab4cf5bb22d8bb8c4fbe9542f9ef5aca79131f8978437f55634a30761221a5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f6ef5d1-35f0-4d7e-8b2b-2950daed8f03.json and https://artists.proofprofile.net/proofs/artist/8f6ef5d1-35f0-4d7e-8b2b-2950daed8f03.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 0x040224f72caf794ea8e210adcd090d4fd23b9eda350c0f5a46af2eb81ad3401d. 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/USHM82121027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ec4e7d2e6ea79dfd53b070eb05bd788870ec4e6984587107c08a7111a4e802. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZNWZ2336756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5ef261a13f80b7aa982f2ca3a6c872c21c7b45a4e126bd0acf10f37bc3a6f6. 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/QZDA72274925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b42f9bc1316af193cd59012ab3f7c8a22975ebfcd0431577ed5c0b74378f4f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWV2345434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bfcea941cf0d34815feeb58ef98aaf3af4969e89b16501e88c8bd530b6d1dc. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZFYY2232629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8ca98488e931b12590e0328e1a98ee1617fd9171b27c70cb2f51f4f1f617a5. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:12Z), 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/USA2B2203261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e5826a0d8fbad6cc6571d4ddc5b60ae8abee2d3e91fef25e34cc96e78e8894. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6J2309130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095feecf25faad2450629ed529ea32a9d46d1b6b9032186e9a0e7eb4e26ebacb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2B2405239.