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 0x60e2eb683d33ef940bf2c546df8f8e834dba4e6b14cd99d67ba4452644647c78. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfa90e84-a2d0-47ed-a097-26d79c440964.json and https://artists.proofprofile.net/proofs/artist/dfa90e84-a2d0-47ed-a097-26d79c440964.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 0xc96f6ba1f60a6cafa30e3ccbc78c6763a781a9fca8ed866c931586c1114e00eb. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZWFU2495725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd639e35b6fe72f6dece4e2289161f916b68ab64d19fe9dc4c6dfe6cb98beaabc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ7L2431150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa40d1503f045e7a1e61772e3395ac6beff3322412559fe15aa94be19ac8b00. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:59:43Z), 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/QZZ7L2438891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490ed11c96da5226dc9e9f3d03c83e06ba749aa163d1b0609903de16df2bb57f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:42Z), 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/QZZ7V2409607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df51152907c9a1fe14cf5dd6b29e44f60bb7570adfb22fb997210f0566f0a0d. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZFZ42560261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387978cfa797ece57e000a1d872777e14c686ac9ec23336c07815b3c80ed3037. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYZ2535937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b368621a47e07cdddc85e825f81de8db7751966f013968a0507e9e29e58e4c5. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZES52518806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cd167c8e7ece8efa17ba82b8a7048896ba59a306ed5b618a0443b751d61fa6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAT2551043.