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 0xde0e23564e2015fd5732d7015e38e6952be64a8122911a3ad268f1d869cf8f25. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddc1f997-09a7-4032-a2e5-e53bae5ba5d8.json and https://artists.proofprofile.net/proofs/artist/ddc1f997-09a7-4032-a2e5-e53bae5ba5d8.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 0xc4869776bf2ff8a57475da3b3a4d111eb4de82b9355016ea0fb78edbcb1abed9. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DEZC62002367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e444d3a293afd5127ee8941654d83e5c6147de125a65be1950cfd87e5b1bf3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DELJ82087522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05de59463993c8f7568a720783472430c28d7c766298782cd93d8266f9028094. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DELJ82087556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e70a38c8e628e49d4944cdd8d7b3e5136522db401abbfb24fc0ca173d1c0e3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEZC62002369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323660a2f3d98d9190da97d6aebbe36ebd5860b1055979324ab12dbebcb1fb1d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEZC62002370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98672a45acec32d15011c8a855581f01cd78f90acd079f51db3f2ab812b4b17. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DELJ82087877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862d2cccb7dd3dbe5072f1e62b385b388a41e5e5291e491e8dc15f9085fcca53. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/DELJ82087878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4fc3dd81222fbbe4125902373dc2022e597f9e98a1ebc1c8c49a40e726d7c6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DELJ82087880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f953d17003fa545b6547c102f9cf27e742f99809b355fcb3da8d61519b8aeb. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEZC62574937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02041ba29d756ab03d06a8573c9bcb4e13a46b616260a0655c861d48f1995f9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:16:23Z), 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/DEZC62574938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25aa627c491ba25b6b36b78fc17d3a3118af5bac83a47f5f77372a4e30cc4c6. 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/DEZC62574939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051f978837bb4119c8482066ccb09b3188248868d1546df24af0427574be0927. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEZC62574942.