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 0x3405a414ada4e7a7193fe7fdf9e3c7cba7e5e26f0e5ae626150a5410dd6888ac. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f3a90a4-4d0f-4123-89d1-e7399c5714e1.json and https://artists.proofprofile.net/proofs/artist/6f3a90a4-4d0f-4123-89d1-e7399c5714e1.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 0xf87baed67ee642dd2ee473d9dd51a4aa11b481d6a8643edfbd2a2f6d0fb7af85. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:56:33Z), 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/DE1O62477002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff8052510cac56a2e2707c7ea6632428755d0feee1da0d157de4645a27e31b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DE1O62476744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deb34abe701b797e855723e04609627a5c1b8944a8dce923c559ccf941b6773. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DE1O62476730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c56419ffd0ccaeb75720eaada9a002ef1072b92ddbfbdc1dafcc97ebf8a616. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:24:40Z), 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/DE1O62477106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dd06fa5716b9d7d191452b4b937fe7dd89ee6a757ec1de9b0d87267b13913a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DE1O62476907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b416da696ae17d84bbe8bcd0d700246a70d0cbd9e68a5420150258265aa418. 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/DE1O62476887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0b09562f60b35f1e1e431cad16e3aea89c4bc9b6fd096e3fe0d6e3e64b3115. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DE1O62477228.