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 0x0ae2b59ad461a2d940159370a2260419e602a2a252098658307847c5800b853e. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c9450b0-9570-454d-96e7-d5421587e9ce.json and https://artists.proofprofile.net/proofs/artist/6c9450b0-9570-454d-96e7-d5421587e9ce.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 0xbcf1a4820b79225de13872da3d92288bfa924fbec77e4bd1d128d9c7cf2dd14f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:40:45Z), 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/MXF399100595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb3e223fbcc36b52d2b23bcef6fc8da0f27722d79faff10947cd166cad06441. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:26:09Z), 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/MXF399100593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a39414d12f02084ccef7d6c065616fa63ecab08406bd7c82d971d6f6a09ca0. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/MXF399100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0995b7e8c05443497ee386ad881e5d067f49846672c3f8fc7a7381eda07aea. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:47:50Z), 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/MXF399100715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454f63642b10169525e56f49046e55b4c5a33ccf90cada5325d8292649f54e9b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:08:00Z), 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/MXF399200963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e159ed53c7bf6f36556e06ca916d6e08f56923c110375feb9a0ddd0f35d890. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/US3DF1423949.