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 0x677347033d99bc0ea727059729682ed2413f4017938cec23df09ed35a6f692e3. 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/6536066f-ea2c-4473-aeb7-e5d493d00a57.json and https://artists.proofprofile.net/proofs/artist/6536066f-ea2c-4473-aeb7-e5d493d00a57.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 0x5a9972fdbf2200289003144362e8e4b08a114db43c2f88dd0a8cc8df9a1fa4ed. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7W2591216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721528266532d99bcc1454bfa18ee54d87dd7e8ad8aa34f9dfe6f8d20ba942ae. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3F62528214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4aa4f3bc87e6ba70c8b87f704b31ee625b39d1fcbca621b9589862fbf82ff4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3F62528215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f33579c4d824f15ca6ef5ac3ecac5f56ec28ed12fa877a7de7a45bf2a316bb4. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:04:31Z), 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/QT6ED2575091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c7b8f069b729ea19ae59d0ae7c4422a90375b48abfc9dcef315fba9aaa4675. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:41:47Z), 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/QT6ED2575093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf255311565fe1fef2ccd31a6b03d66fb4abc0c687d6710612e43332ff3d5c42. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT6ED2575094.