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 0xe6724f055d1cbb6bfd0c7113889fa5d83b6e000e87e40801ee8e6b9eaabe647e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b03b509-cb78-49db-900f-1b9c976a402f.json and https://artists.proofprofile.net/proofs/artist/5b03b509-cb78-49db-900f-1b9c976a402f.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 0x92e9ad7ddbda7c7b023d946d2be377427964eada34c94ec0d21fe4c09826e4d8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:17:28Z), 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/AUGBT2483473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b94a45258a2a75c51999563f03e0661443da74fc38a1424b9e98cce70b5d52. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/AUGBT2483475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eaf8b36cedaea762574a02360df76be38850fd6c6e5ee09788557c126cd892. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/AUGBT2483476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f32c0ce91e3a0c949cf6068708d075f6533f0de60ac4dfde063bd3c9445eafb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUGBT2483479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0e04513c6b72ab98895fa930c87643f172b587f9150ddfa80ea842a51211d7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:45:52Z), 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/AUGBT2483481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987153382d0ac81f4994aa01c8c6e4a6152bd1da84dab64ac29d9266f3bc4690. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/AUGBT2483482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4114bc923be758baf4ef07d27d760975e22d08f10ff0f3c772ec7965e96ec93. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUGBT2483484.