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 0x25ab9b29e2cfa619e880be22261945214cdc3c2b8ffefecb35a91511eed5789c. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62d31c6c-da4d-4871-9113-f3f6d29b0320.json and https://artists.proofprofile.net/proofs/artist/62d31c6c-da4d-4871-9113-f3f6d29b0320.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 0xa1c3b5dadb47e2e56ba34ac1a8efd429e330526f5297c8bafc6b0a604de62418. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:56:12Z), 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/DEA760007911.
Jägerchor aus der Oper " Der Freischütz "
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2d22e59e87afb0834488b1d1b030a54546b50e751d5f2114875e9931ed6d1d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEA760008009.
Priesterchor aus der Oper " Die Zauberflöte "
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b9c0ce40df50560360052213ad888df5482c204cd1a9bae72b9cd22b3e6364. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEA760008011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6ff5803a3bcf7fb50326cff13b4e0d7078b507f81381697702aea66e5edaa5. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/DEA760008013.
Matrosenchor aus der Oper " Der fliegende Holländer "
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a0298ed730504e4a308ce962cdef87d8b6745b0f753d51cf11d62fefda9793. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:16:15Z), 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/DEA760008014.