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 0xf73b8b7a5da2e3d02e52f19481a3a9ebdaf0e7253bb53d92125c3ebe6144436c. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db3f9d99-ae6c-4203-8a4b-c92848b9065b.json and https://artists.proofprofile.net/proofs/artist/db3f9d99-ae6c-4203-8a4b-c92848b9065b.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 0xb36a8683321b49d74e8890477304d1d3d69f0cf719d91db551742af843e8f9ea. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBMJG2335668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6469e41bc11fc69239c6656dfd4f522e52512d95b3d000f793a1bd245c156d. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:42:25Z), 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/FR9W12412718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfe0d91c73cabc379b4d2d477bdc934d8cf2bb48a5b959e641156bcdf29b53d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR9W12455199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb808ef9f66a9fdb4463519a4c971cb49b99b21b9b1cde41f862f45540d285b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:28:03Z), 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/FR9W12466090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3033ad7885b802e682c9a9c15bdcf4eb67d9cf38dc4e995571fb0c19a937fe4. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:01:28Z), 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/FR9W12521670.