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 0x35cc08265057daae61ddf338a268ecb6ca1a745d7d0f5822efcff9bb9b4c9ca6. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a3207c8-2079-49b7-88b5-de1223698f2f.json and https://artists.proofprofile.net/proofs/artist/7a3207c8-2079-49b7-88b5-de1223698f2f.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 0x0c4bb206f89a511b055aa2c45a90da80e397d799139811e41f3e63ab3029f118. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:11:43Z), 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/RUA3R2082747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ac7052e05e8f408697f54d99694d51fbd2a32b8737475c97b0e9438b80675f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:17:34Z), 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/RUA3R2082770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7f6595fe5de2476bf47d75539a47103dc3a135df0069f9494e28a0bfba0ac5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:19:42Z), 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/RUA3R2082811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e73f10ffa38c70b919b7929dc1551303e5dd49dcfc1a1ac30fffaa15683010. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/RUA3R2082815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555eb727ff408f9fbb7f1a6f971902bad31bb9f689eb680830167a4e32623cb1. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:20:35Z), 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/RUA3R2082818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f006e27b66674e281d9e048e207cdf89aa65835b030d2910131b258bdc5969e. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:01:13Z), 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/RUA3R2082821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cd5f9a04a7675e8e9fc88f19a205894816c5e4c7f21f6f79c834611319ce5c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:17Z), 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/RUA3R2394514.