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 0x69de8d4285742fd4ec49887e6cf5db4b510f29591dec03cac8d1bf4a8672595e. 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/d45551d4-a5f8-49ea-9b35-56648c3ce2e9.json and https://artists.proofprofile.net/proofs/artist/d45551d4-a5f8-49ea-9b35-56648c3ce2e9.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 0x44dfe85e8cc72bc60e33d1e4fd6d98ff37e3730bdba4cf6d790113893b12070c. 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/QZK6N1913821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ecc551c44cb086b95dfe46adf5d4f72fdaf01ceaa3d1fa79126adb9c739494. 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/DEKB72425920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8976de40874a6e125a2d594e306f305a0602411740a78cd3fec370aa521133f6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEKB72425910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8e6aca33bfd5e6bae2a2a9751e13efa3e45d044b7439e431372083cd28d18b. 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/DEKB72425914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd58fc591b1661906d4beec235412ec31e4e969fd580cb2e6377fb51b895e9d. 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/DEKB72425915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfcc6cd287a471746522d3950a2df5f2468f230944fe106d5e09a7ce3dbc407. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:31Z), 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/DEKB72425917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2d89d2c9419a05c39b313868a5714951e401e32141c6009249a163f9ccf843. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEKB72425897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e9ce0e68b1e1332b6045baf59b58b463c088510d6314feb0cf930ed29fb4be. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEKB72425902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6242e18fb922d737bf6cd704b069146ac92dcb1713369e04aca32eef5d01754. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:52:22Z), 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/DEKB72425904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc648146be59a16f68714e0c35446d538bfd6a3151e0b519d64b071d4d6c9b0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEKB72425907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05eb08436eee87d2069b24a4935ad4044a0dcd85b9e6cde842867dedaecec11. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEKB72425908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46e70ebc428a0b66433638b46054cdcdf1ea623b24f0ed742b5ec1840a3b645. 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/DEKB72543201.