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 0x281578a3fcf0cb088a26c71c508259a075abd386568c1deb719c5cc872385f91. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce8ea7ac-088c-42c4-9f7c-11aa4950156b.json and https://artists.proofprofile.net/proofs/artist/ce8ea7ac-088c-42c4-9f7c-11aa4950156b.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 0x26bb49bf01fbc6d336b3479b874109c00ff893f3bc9017f911c2520ee28700b3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAEK1900666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2308a56b248c905d7afb437aeba345f2070f0aeca1ac4ef4efff5683fd4b342e. 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/TCAEM1916766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d966f8607b9aff8ea7ee8644aa1313d522e216b1d8d91ae4f48f749404e8a11. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/TCAEM1916768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce7de8771bc2237968fa29f2bc58b374554757a7095b5313973dfdfe7b77ea9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEM1916784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705b990dd11287a12c7d77aca1eaa8d255c36330d6d2f56cf98ab7a742bb132d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAEM1947900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caf26cb9a0e735bb038a4bb25b77ac738d229fd6e0f60ee39777b2e5aa90e31. 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/TCAEM1947912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70beb924c1aa52c48ae663ed7bd476642df961387b665fdee9464385bf33331. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:26:55Z), 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/TCAEO1955224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8281b050166d6f81c7a9f9ae41246107ffaff7e69b9ece696415a45211418fc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCACW1726887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce63b94554a2bd0778a9c0faf10bafb7c2218686637de1773a1af5f8001e845b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADX1824391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9ebcabb521250cbb67a2eea616b8bafc13c1fc0ecbef8017da2ad291c0671. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:23:01Z), 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/TCAJB2403061.