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 0x24e4905bffc84ac012045966ec25820b0bbe72e3140218e67a9892df82d0a3a8. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ba6e826-4b08-4b81-91c7-0bc25abecd68.json and https://artists.proofprofile.net/proofs/artist/9ba6e826-4b08-4b81-91c7-0bc25abecd68.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 0xe1ed0c71bc22e33ef2846f4f65c3d2d556a11bc35bacfa6e101f6d17399bf801. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3X51429803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3821f72b5cfb9207057b695251ea6ee9c96b85acd5aa59e6a13b171ae0679e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:44:31Z), 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/US3X51429807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c67d5c8842f4c970701abe06d54d70925800cbf1febd1dc430693493315f1b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITH711800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbe537b18c06a9d01e39cc2ea31dad00726307541a3433aad1bf0d53f35cab3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:10Z), 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/US3X51841403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa50b96bd6a4a849476487a63f681156bf685557365ac9e85b0dadbb0425f63. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:39:50Z), 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/ITH711800136.