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 0x7c55e82cbbd1ef419664770e44128ee56a44fa6f7ed3c5f6ea96ad4edd011cee. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1150a949-5953-4deb-ba8f-05f3be392aa5.json and https://artists.proofprofile.net/proofs/artist/1150a949-5953-4deb-ba8f-05f3be392aa5.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 0xf47696beecb9999396c01918e7e2dfaf096f55c355d396f19245e2f685125c2a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:43:18Z), 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/QZFZ22327887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379387f9e4c80b466dcd84c40225b105a779dc71e3fa38a53d3ee3d0cd956fa2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHNC2407944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9580cd98196d8f1509a59c817c7ff92e28acb0c0be25e4baeb7b3d228cdaba88. 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/QZWFU2430676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c28444cabbb096e77c38e4d4c5d6d9bc8744412297147cd02ea957340564274. 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/QZWFU2430678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5ad8ca7be296ce951b33ea84e47b286360875c7b7dad5ffa2b11f5eeff4ca5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:18Z), 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/QZZ7W2476437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffef338c8f23fb6efdb019b9af140b42b3692d2d525580dbdc6fe3acbb6d55c4. 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/USA2P2539381.