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 0x5e3994caa884b3e1ed524aea75d291a001ffe74b23e64b95524b4a431fa22952. 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/fb6b083d-5918-4df3-8b14-72a2d63e413d.json and https://artists.proofprofile.net/proofs/artist/fb6b083d-5918-4df3-8b14-72a2d63e413d.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 0xe5f0f1ff18032fdf8bfc3abe0ec560a4d927a39f850229a7d251ce31eb74966f. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/INH101903211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aec3cebfed2db470ed55278351cb108ad1f268c59970bcc1bed558d52c150a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/INH101903221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271206f628e85ec5ffb2e9cc61221818351575d61d776bdeae0883a49a581f35. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/INH101903230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d396b0a6119734352648208700dd15b3fc77438d70b4fd10ab068c9c3d624a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:02:53Z), 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/INH101903220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9569b5d6e1ad53b38aea71bb4499ac9bad35422e8298aa06f8e75ff2f41c91f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/INH101903226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f0aa59165b19de99945e83dac37e5df7427be596599c2766ace8fa7743eec3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:08:48Z), 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/INH102409343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99c2df8183856b772321a36c13f4fec68d7720beca9a16ebd68ae7286e08264. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INB5J2500106.